I call a Function module (RFC ) present in BI from ECC. When this FM gets executed it throws the following error.
An error occurred when executing a Remote Function Call.
"CPIC-CALL: 'ThSAPOCMINIT' : cmRc=20 thRc=666#Error occurred in the SAP network
Status of connection.... "CODE=CM_PRODUCT_SPECIFIC_ERROR -1 -1 SAPCODE=666
Internal error code.... "RFC_IO5"
There is an error in the communication system. To clarify
and resolve the error, contact your system administrator.
Last error logged in SAP kernel
But this error occurs less frequently.Experts kindly show some lights on this problem?