Getting error 'Object Operation Mapping | not found' in FILE TO IDOC pass through scenario

Hi Experts,

I am working on File to IDoc pass through scenario in SAP PO 7.5 single stack. I will be receiving file in Idoc XML format from SFTP and sending it to ECC. I am not using mapping here, this is a pass through scenario. So I am not building ESR, only ICO with SFTP sender adapter channel and IDoc_AAE receiver adapter channel. I am giving dummy interface name ORDERS.ORDERS05 and namespace as urn:sap-com:document:sap:idoc:messages in ICO. But I am getting error message 'com.sap.aii.ib.core.oa.NotFoundException: Object Operation Mapping | not found'. As this is pass through scenario I am not passing Operation mapping and SW Comp Version. Please help me to sort this out. Am I missing something? Thanks in advance.

Note: File to File pass through scenario is working fine for me.

Thanks and Regards.