BGRFC Error- Server group does not get resources (may be incorrectly configured)

Hi Experts,

I configured BGRFC in ERP system Client 000. But when i send an asyncronous message to ERP from SOAPUI, I get the error "Server group does not get resources (may be incorrectly configured)" in SRT_MONI. I know that message belongs to  message class BGRFC(139) but I couldn't find what was causing this issue or where the message was raised.

What might be the reason for getting that error?

Note: I did the same configuration in another ERP system and there were no problems.

Thanks,

Regards.