2601029 - IDoc metadata cannot be loaded when using IDOC_AAE adapter, throwning the error RELATION_NOT_FOUND

You are using Process Integration (PI) or Process Orchestration (PO) IDoc_AAE adapter to send IDocs, you notice that IDOCs are generated in sender ECC system. But get stuck in SM58 with Status Text "RELATION NOT FOUND".

In default trace, there is following error:

[JRA] ResourceAdapterImpl.sendDirectToMdb, exception: com.sap.conn.idoc.IDocRuntimeException: Unable to get meta data for IDoc type XXX with extension XXX: RELATION_NOT_FOUND

• SAP NetWeaver 7.3
• SAP enhancement package 1 for SAP NetWeaver 7.3
• SAP NetWeaver 7.4
• SAP NetWeaver 7.5

IDOC adapter, IDOC to XML, IDOC stuck, Process Integration 7.0, PI 7.0, PI 7.01, PI 7.02, Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, Process Integration 7.30, PI 7.30, Process Integration 7.31, PI 7.31, Process Orchestration 7.40, PI 7.40, PO 7.40, Process Orchestration 7.50, PI 7.50, PO 7.50, NetWeaver, XI , KBA , BC-XI-CON-IDO , Idoc Adapter J2EE , Problem