# Guide to OpenIG
Chapter 13. Troubleshooting

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## 13.1. Object not found in heap

    HTTP ERROR 500
    org.forgerock.openig.model.NodeException:
     ['file:/Users/george/.ForgeRock/OpenIG/config.json'].heap.objects[2]
      .config.filterObjects[0]: object not found in heap
    at org.forgerock.openig.heaplet.HeapUtil.getRequiredObject(HeapUtil.java:54)
    at org.forgerock.openig.filter.Chain$Heaplet.create(Chain.java:49)

You have a filter specified in the filterObjects list in the Chain object that is not in `config.json`. Make sure you have added an entry for the Filter and have correctly spelled its name in the filterObjects list.