SAP Community - SAP BTP, ABAP environment

SAP Beginner

2026-05-09T10:16:54.504000+02:00

Hi everyone,

I'm currently working as ERP consultant with scripting, customization and API integrations, and now I want to move completely into SAP development
I would like guidance on how to start my SAP learning journey and which path would be best for becoming an SAP developer with Data and AI (Hybrid role).

I'd really appreciate any roadmaps suggestions or advice from experienced professionals.
I have student subscription, I also want to understand how to use it effectively for hands on practice and real project learning.

How to update Virtual Element field in list report from action button c

2026-05-13T08:34:23.012000+02:00

Hi Experts,

I have a custom Fiori application , in Projection view there is a virtual element added which is a qty field . The requirment is to update the virtual field for the selected records in the fiori application on a button click through RAP action.The qty field should be calculated for user on click and show the value temporarily in the new virtual column in the list report. Kindly guide on how this can be achieved ,in ABAP class of the virtual field the global variables set inside the behaviour class is not available or getting cleared.

Regards

Niranjan

Converting Dynpro Transactions to SAP RAP & Fiori Elements

2026-05-14T20:45:45.247000+02:00

Hi all,

Is there anything that helps in converting a transaction (Dynpro) to RAP with Fiori Elements? Perhaps a tool, an AI, or a specific framework?

Has anyone done something similar?

Best regards,

Renato.

I need to show the entries in descending order in the value help for the app built using RAP CDS.

2026-05-15T07:04:37.767000+02:00

I need to show the entries in descending order in the value help for an app built using RAP CDS.

My first screen displays all the entries. I then select a row from the list, which navigates to another screen based on Fiori Elements faucet annotations. On that screen, I edit the entries and use value help/search help. In that value help, I need to display entries in descending order or show the top 4 most recent entries. However, whatever I try so far is showing the entries in ascending order. Any suggestions please?

RAP Draft: Side Effects for Associated Text Fields not reflecting in UI (Fiori Elements OData V4)

2026-05-15T09:07:46.502000+02:00

What I'm trying to achieve ?

When the user types or selects a new VehicleNumber on the Create/Edit screen:

A backend determination finds the corresponding DriverID.
The UI automatically refreshes the DriverID, DriverName, and DriverMobile fields on the screen.

What I have implemented ?

1. Behvaior definition : Defined the side effects to trigger a refresh of all three fields when the vehicle field changes.

// Side effects
  side effects {
    field VehicleNumber
      affects field DriverID, 
              field DriverName, 
              field DriverMobile;
  }

  determination FillDriverDetails on modify { field VehicleNumber; }

2. Determination Logic 'FillDriverDetails' : Initially, I only updated the DriverID, expecting the SADL engine to perform the join and fetch the name/mobile during the subsequent read.

" Reading master data for the vehicle to take the assigned the DriverID
  
  MODIFY ENTITIES OF ZI_TripHeader IN LOCAL MODE
    ENTITY TripHeader
    UPDATE FIELDS ( DriverID )
    WITH VALUE #( ( %tky     = <ls_trips>-%tky
                    DriverID = ls_driver-d_id ) ).

3. The Netwrok behaviour: When changing the Vehicle Number in UI, the side effects work perfectly on the frontend.
a. UI sends a PATCH with the new VehicleNumber.
b. UI immediately sends a GET request explicitly asking for DriverID, DriverName and DriverMobile ($select=DriverMobile,DriverName)

The Problem : The DriverID is getting updated with the new value in the UI. But, the Driver Name and Mobile number fields are getting the old value (value previously available or empty) and the UI is not reflecting the change.

To my perspective, the side effect is working as expected. But the framework is not resolving the associated field values of Driver CDS view.

UI: SAP Fiori Elements (OData V4)
Entities: ZI_TripHeader (Root) with associations to ZI_Vehicle and ZI_Driver and a composition relationship for ZI_TripIncidents.
DriverName and DriverMobile are read-only fields in the root view, pulled via association (_Driver.FullName, _Driver.Mobile).

Below is the CDS view entities.
1. ZI_TripHeader (root Entity)

@AccessControl.authorizationCheck: #NOT_REQUIRED
@EndUserText.label: 'Root entity for Trip transaction'
@Metadata.ignorePropagatedAnnotations: true
define root view entity ZI_TripHeader
  as select from ztab_tripheader
  composition [0..*] of ZI_TripIncident as _Incident
  association [1] to zi_driver          as _Driver  on $projection.DriverID = _Driver.DriverId
  association [1] to ZI_Vehicle         as _Vehicle on $projection.VehicleNumber = _Vehicle.VehicleRegNumber
  association [1] to ZI_LoadTypeVH as _LoadTypeVH on $projection.LoadType = _LoadTypeVH.LoadType
{
  key t_tripid              as TripID,
      t_cdate               as TripDate,
      t_vno                 as VehicleNumber,
      t_driverid            as DriverID,
      t_source              as StartPlace,
      t_destination         as EndPlace,
      
      t_loadtype            as LoadType,
      t_status              as TripStatus,
      t_tot_exp             as TripTotalExpense,
      
      @Semantics.user.createdBy: true
      created_by            as CreatedBy,
      
      @Semantics.systemDateTime.createdAt: true
      created_at            as CreateAt,
      
      @Semantics.user.lastChangedBy: true
      last_changed_by       as LastChangedBy,
      
      @Semantics.systemDateTime.lastChangedAt: true
      last_changed_at       as LastChangedAt,
      
      @Semantics.systemDateTime.localInstanceLastChangedAt: true
      local_last_changed_at as LocalLastChangedAt,

      // ---> below two associated fields are not resolved for UI Refresh
      _Driver.FullName      as DriverName,
      _Driver.Mobile        as DriverMobile,
      
      _LoadTypeVH.Description as LoadDescription,

      // Make association public
      _Incident,
      _Driver,
      _Vehicle,
      _LoadTypeVH
}

2. ZI_Driver (associated entity)

@AbapCatalog.viewEnhancementCategory: [#NONE]
@AccessControl.authorizationCheck: #NOT_REQUIRED
@EndUserText.label: 'Interface view for driver'
@Metadata.ignorePropagatedAnnotations: true
@Search.searchable: true
define root view entity zi_driver
  as select from ztab_driver
{
      @EndUserText.label: 'ID'
  key d_id        as DriverId,
  
      @EndUserText.label: 'Name'
      @search.defaultSearchElement: true
      d_full_name as FullName,    // this one
      
      @EndUserText.label: 'Phone'
      d_mobile    as Mobile,      // this one
      
      @EndUserText.label: 'Emergency'
      d_emobile   as Emergencymobile,
      
      @EndUserText.label: 'License'
      d_license   as DrivingLicense,
      
      @EndUserText.label: 'Expiry'
      d_lexpiry   as LicenseExpiry,
      
      @EndUserText.label: 'Govt.ID'
      d_govid     as GovernmentID,
      
      @EndUserText.label: 'Aadhar'
      d_aadhar    as AadharCard,
      
      @EndUserText.label: 'PAN Card'
      d_pan       as PanCard,
      
      @EndUserText.label: 'Status'
      d_status    as DriverStatus
}

The Root and child entities are draft enabled.

Am I missing anything important detail for the framework to resolve the values of associated fields ? I'm expecting experts inputs and opinions. Thanks in advance.

Screenshot of DraftTable - Added upon Junwu comment

Best Regards,
M Boopalan

BTP Trial Account-Unable to login to ABAP Cloud Project in Eclipse ADT

2026-05-21T21:54:10.632000+02:00

Hi All, I am unable to login in to ABAP Cloud Project from Eclipse ADT. This was working last week.

I am able to login to BTP Cockpit and I still have 20 days left for my trial account.
In Eclipse-Click on Cloud Project-Open Logon Page in Browser-logged in with email ID and password-It is asking oAuth credentials.

I am facing this issue for the past 4 days. Anyone facing this issue?

Connection between BTP to On Premises ERP not working

2026-06-01T18:41:19.257000+02:00

Hello, i am connecting my on premises system to BAS.
1. Cloud connector setup is done and connection is fine between cloud connector and On premises system . on checking connection it says - "Backend is reachable from cloud connector".

2. Configures on premises system from BAS, entered all the variables like WebIDEUsage, WebIDEEnabled, HTML5.DynamicDestination, HTML5.Timeout

3. Getting below error when opening ON premises system from BAS - "

Could not get v2 and v4 services."
4. /IWFND/CONFIG is published in /n/IWFND/V4_ADMIN
5. Tcode- /n /IWFND/ERROR_LOG is showing error - Service '/IWFND/CATALOG' version '0002' repository 'DEFAULT' not registered

6. While accessing url - https:///sap/opu/odata4/iwfnd/config/default/iwfnd/catalog/0002/ServiceGroups?$expand=DefaultSystem($expand=Services)
getting error

"Service '/IWFND/CATALOG' version '0002' repository 'DEFAULT' not registered",

but as i mentioned /IWFND/CONFIG is already registered.

So, help me in setting up connection between BAS and On premises ERP

Custom App Interface Publishing Issues of ABAP Development Tools platform

2026-06-09T16:04:42.072000+02:00

HI,

In the SAP S/4HANA Cloud environment, developers use the ADT (ABAP Development Tools)platform to create custom application tables and publish them as OData interfaces for externalsystem calls. At the same time, certain fields (such as sapdatakey3 ) need to be controlled as read-only on the frontend Fiori UI. The following issues were encountered during implementation:

When the interface is called, data is only written to the draft table, not the base table.
Attempts to use field (features : instance) in the behavior definition to dynamically controlread/write operations fail because HTTP headers cannot be reliably obtained to determine thecaller source
Using field (features : instance) in the behavior definition to control field read-only with%field-sapdatakey3 = if abap behv=>fc-f-read only results in the interface being unable to writedata.
After disabling draft mode, the "Create" and "Edit" buttons disappear from the frontend Fioriapplication.

RAP - Behavior projection - Error on activating Behavior projection

2026-06-18T19:54:07.341000+02:00

Hi All,

Managed scenario - Created three levels of RAP BO.

Behavior definition is successfully activated however could not able to activate the "Behavior Projection". Follwing is the error under ADT Problem -

The association "_CUSTOMER" cannot be used as a transactional association since the target entity "ZSRA_R_CUSTTP" is not redirected to "ZSRA_C_CUST" in the CDS definition.

define root view entity ZSRA_C_CUST
provider contract transactional_query
as projection on ZSRA_CUSTTP
{
key CustomerId,
      CustomerName,
      CreatedBy,
      CreatedAt,
      LastChangedBy,
      ChdLocalLastChangedAt,
      LastChangedAt,
      /* Assoziationen */
      _project : redirected to composition child ZSRA_C_PRJ
}

------------

define view entity ZSRA_C_PRJ
as projection on ZSRA_R _PRJTP
{
key CustomerId,
key ProjectId,
      ProjectName,
      Project,
      ProjectType,
      Data,
      Exporter,
      CreatedBy,
      CreatedAt,
      LastChangedBy,
      PrjLocalLastChangedAt,
      LastChangedAt,
      /* Associations */
      _customer : redirected to parent /OSGMBH/ ZSRA_C_CUST,
      _sys: redirected to composition child ZSRA_C_SYS

}

------------
define view entity ZSRA_C_SYS as projection on ZSRA_ R_SYS
{
    key ProjectId,
key SystemId,
    key CustomerId,
    SystemName,
    Service,
    Tenant,
    CreatedBy,
    CreatedAt,
    LastChangedBy,
    SysLocalLastChangedAt,
    LastChangedAt,
    /* Associations */
    _project: redirected to parent ZSRA_C_PRJ,
     _customer
}

Behavior Projection –

projection;
strict ( 2 );
use draft;
define behavior for ZSRA_C_CUST alias Customer
{
use create;
use update;
use delete;
use action Edit;
use action Activate;
use action Discard;
use action Resume;
use action Prepare;
use association _project { create; with draft; }
}

define behavior for ZSRA_C_PRJ alias Project
{
use update;
use delete;
use association _customer { with draft; }
use association _sys { create; with draft; }
}
define behavior for ZSRA_C_SYS alias System
{
use update;
use delete;
use association _project { with draft; }
use association _customer { with draft; } <-- Error
}

Thanks & regards

Shobhan Rana

Guidance on Entering the SAP Ecosystem for a Technical Graduate.

2026-06-25T15:00:33.910000+02:00

Hello community! I'm a recent M.Tech graduate in Computer Science with a solid Java and DSA foundation. I'm currently in a high-pressure role that doesn't align with my skills or well-being.
I'm seeking a sensible exit strategy and looking to pivot into the SAP ecosystem. I'm torn between stepping into ABAP, HANA or exploring the Business Technology Platform.
I'd love to hear from experts about which path offers the best balance of career growth, financial reward, and stability, without the burnout. Where should a technical fresher like me begin?"

UI5 component not loading in BTP Trial – app-preview error

2026-06-29T10:01:09.058000+02:00

Hi Experts,

I am getting the below error for all applications in my BTP Trial account: "Failed to load UI5 component for navigation intent #app-preview" Apps are not opening from Launchpad. Attaching the same for the reference.

Could you please help what could be the issue?

Thanks.

SAP BTP, Cloud Foundry runtime and environment SAP Fiori #SAP UI

Complete Beginner Seeking Guidance to Become an SAP ABAP Developer

2026-06-30T14:57:01.012000+02:00

I'm a final-year engineering student and a complete beginner to SAP. I don't have any prior knowledge of SAP, but I'm highly motivated to learn and build a career as an SAP ABAP Developer.

I recently got access to the SAP Learning Hub, Student Edition, and I'm a bit confused about where to begin. There are many learning journeys and courses available, so I'd really appreciate some guidance.

Could you please suggest:

- The best learning path for a complete beginner who wants to become an SAP ABAP Developer.

- Which courses or learning journeys I should complete first.

- Any hands-on practice resources, projects, or tips that helped you when you started.

Thank you in advance for your guidance and support!

Generate Barcode for each material master record item, to print it in the GR output form?

2026-07-08T11:40:40.668000+02:00

Hi Team, our client has raised a requirement wherein, they want to generate and activate Barcode for each material master record and print it in the GR output form.

On checking on this, I found that this can be achieved by using EAN and generating System Barcode in SE73, however, I am not clear on the process.

It would be of immense help if anyone who has done this before or knows about this can share some insights. Thanks!

Problem in extending V4 RAP service to List Report UI via CAPM Layer

2026-07-08T14:41:50.312000+02:00

I have created a Managed scenario in RAP and used V4 service binding. Then I created a CAP project in BAS consuming that V4 service and metadata. In service.cds and service.js too, I didn't added any custom functionality, just basic entity projection in service.cds and basic tx function for all methods (CREATE, READ, UPDATE and DELETE) in service.js as I want to use the CRUD functionalities offered by Managed RAP scenario directly.

Then I created a List Report Application using Local CAP Project and consuming this CAP project mentioned above.

Now when I am previewing this application, no data is showing in the List Report by clicking GO button. If I click on Create Button, Object page is always in busy state and never loads. But If I load the Fiori Preview in RAP, all CRUD operations works fine.

In the Console, these errors come while loading the site from cds watch in BAS -

Can anyone help what else should be done and where? And CAP layer is required for my Requirement as I have to implement roles and securities and other security related stuff. Directly coonecting FIori App to local system and consuming service is not a feasible solution for me

Unable to publish RAP service in testing system.

2026-07-08T16:46:19.949000+02:00

My RAP application is working fine in development system, Transport got moved to testing system but RAP service binding is not published. Onprimise system, Odata V2 UI

Fiori tile is generated in testing system but displyaing blank screen. Kindly suggest

Thanks in advance,

Prasanna kumar.

Reading BTP destination parameters using BTP ABAP

2026-07-13T08:49:27.090000+02:00

Hello Community,

Is it possible to read BTP destination parameters in BTP ABAP?

Requirement is to maintain parameters in Additional parameters section in BTP destination and then read it from BTP ABAP. How can this achieved?

SAP BTP ABAP environment

BTP ABAP Environment: Inbound Service - System to System

2026-07-14T16:04:31.136000+02:00

Hello,

I have an ABAP RAP OData service (Service Binding) on BTP ABAP Environment. I want an external system to call it. I have it running now with Basic Authentication.

What is the advisable secure way to do this system to system communication to BTP ABAP Environment?

I did research on "OAuth 2.0 - Authorization Code with PKCE", but it seems that this for users and not for system-to-system.

In RAP how to filter an association via button

2026-07-14T16:42:48.019000+02:00

Hello All,

I do not find any answer online. So I hope you can help me out.
I got a RAP app which contains of some CDS Views in parent child relation and some "normal" associations.
Each Entity has its own UUID and a reference to the root entity.
This root UUID is used to associate to a foreign CDS and all entries are displayed within all entities.
I now want one button which takes the UUID of the specific entity and filters the data of the association accordingly
A short coding example

define root table entity rootEntity
{
  key key  : key;
      uuid : uui;

      @ObjectModel               : {
        sort.enabled             : false,
        filter.enabled           : false
      }
      _Child : composition of exact one to many children;
     
      @ObjectModel               : {
       sort.enabled              : false,
       filter.enabled            : false
      }
      _foreign : association of exact one to many foreigns on $projection.uuid = _Activities.uuid_root_reference;
}

Child

define table entity child
{
  key parent_key : key;
  key key        : key;
      uuid       : /uuid;

      @ObjectModel:{
        sort.enabled: false,
        filter.enabled: false
      }
      _parent : association to parent parent on $projection.parent_key = parent.key;
      
}

on Consumption level

root

define root view entity c_parent
  provider contract transactional_query
  as projection on parent

{
  key     key   as Key,
          uuid  as UUID,
          @ObjectModel:{
             sort.enabled: false,
             filter.enabled: false
           }
          _Child : redirected to composition child c_children;

          @ObjectModel:{
            sort.enabled: false,
            filter.enabled: false
          }
          _foreign : redirected to c_foreign

}

child

define view entity c_children
  as projection on children

  association of exact one to many c_foreigns as _foreigns on $projection.parentUUID = _foreigns.UUIDRootReference

{
  key key as Key,
  key parent_key as ParentKey,
      _parent.uuid as parentUUID,
      uuid,
         
      _parent : redirected to parent  c_parent,
      _foreigns
  
}

in parent and child bdef I now want to have this:

 action (features : instance) filterByUUID result [0..*] entity c_foreigns;
side effects {
    action filterByUUID affects entity _foreigns;
  }

The foreigns association is linked as line item reference and does not contain a filterbar.

{
        id                : 'Foreigns',
        purpose           : #STANDARD,
        position          : 10,
        label             : 'Foreigns',
        type              :  #LINEITEM_REFERENCE,
        targetElement     : '_foreigns'
      },

In coding i want somethind like this:

READ ENTITIES OF parent IN LOCAL MODE
      ENTITY parent
      FIELDS ( uuid )
      WITH CORRESPONDING #( keys )
      RESULT DATA(lt_parents).

        LOOP AT keys ASSIGNING FIELD-SYMBOL(<ls_key>).

          LOOP AT lt_parents REFERENCE INTO DATA(lr_parent).

            SELECT
              *

            FROM
              foreigns

            WITH PRIVILEGED ACCESS

            WHERE
              uuid_root_reference = @LR_parent->uuid

            APPENDING TO TABLE
              @result.


          ENDLOOP.

      ENDLOOP.

any hint how to achieve that I can filter the foreigns for the current entities uuid would be nice.
Thank you in advance and best regards.

Matthias

ABAP trail account

2026-07-18T07:04:43.743000+02:00

Hi Team,

I'm trying to connect Eclipse (ADT) to my SAP BTP ABAP Environment trial instance and consistently get the following error:

"You were successfully authenticated, but an error occurred during the Service Instance logon. Please ensure that your user has the appropriate roles."

On the final logon step in Eclipse, I now get a more specific error: "Logon to system TRL failed (Logon has failed.)"

Environment details:

Trial region: AP21 (Singapore - Azure)
System ID: TRL
Subaccount: b3e21025trial
ABAP instance name: default_abap-trial
Instance service instance URL: https://a396c05d-a792-494b-a9f2-5b3f674def78.abap.ap21.hana.ondemand.com

What I've already tried:

Deleted and recreated the ABAP environment instance via booster (multiple times)
Generated a completely fresh service key and used it in a brand-new Eclipse ABAP Cloud Project
Confirmed I can log in successfully via browser directly to the same system URL above (Fiori Launchpad loads fine, shows Development/Music Festival Manager tiles)
Tried logging on via incognito browser window with "Copy Logon URL to Clipboard" to rule out session/cookie issues — logon succeeds in browser, but Eclipse still fails
Updated ADT plugin via Help → Install New Software using https://tools.hana.ondemand.com/latest
Waited several hours between instance recreation and retrying (to rule out backend propagation delay)
Checked Role Collections at subaccount level in cockpit — no ABAP-specific role collections are listed (only BAS/Cloud Connector/Destination-related ones), and I don't have access to "Maintain Business Users" in the ABAP system itself (shared trial user)

Since browser/Fiori access works but ADT logon specifically fails, this seems to be isolated to the ADT communication/OAuth handshake rather than general user roles. Could someone from the SAP team check the backend provisioning for this instance/user?

Thanks in advance.

How can I deploy an SAP RAP application for third-party users without providing SAP credentials?

2026-07-22T08:57:42.134000+02:00

Hi Experts,

I have developed an application using the ABAP RESTful Application Programming Model (RAP) on SAP S/4HANA Public Cloud.

My requirement is to make this application accessible to third-party users (such as vendors or customers) without creating SAP user accounts or sharing SAP credentials.

For example, I want to build a vendor portal where external vendors can:

View RFQs assigned to them.
Submit quotations.
Update the status of their responses.

The business users do not want external users to log in directly to SAP.

I would like to understand the recommended approach for this scenario:

What is the best architecture for exposing a RAP application to external users?
Can SAP Build or SAP BTP be used as the frontend while RAP remains the backend?
Should I expose RAP business objects using OData/REST APIs and implement authentication using SAP Cloud Identity Services (IAS) or OAuth?
Are there any SAP-recommended best practices or reference architectures for this use case?
How are security, licensing, and authorization typically handled for external users?

If anyone has implemented a similar solution or can share documentation or architecture diagrams, I would greatly appreciate your guidance.

Thank you!
Omkar