DeltaQ: Error when opening an RFC connection (CM_ALLOCATE_FAILURE_RETRY)

RFC server test failed: Error when opening an RFC connection (CPIC-CALL: ‘ThSAPOCMINIT’, communication rc: CM_ALLOCATE_FAILURE_RETRY (cmRc=2)).

Make sure, the RFC server program, e.g. XTRACT01, is allowed to register on the SAP gateway, see Registering RFC Server in SAP Releases in Kernel Release 720 and higher.

In some SAP Releases asynchronous communication between external partner e.g., Xtract Universal and/or Xtract IS and RFC-Destination can lead to above mentioned error message, although all customizing steps have done properly. Make sure to either use the full-qualified-name (FQN) or IP address of the SAP Gateway Host in all involved systems.