Sysfail status in SMQ1

Hi

I have sysfail error in tRFC and qRFC (SM58 and SMQ1) Error message with function module not found and exception raised .Scenario is from ECC-XI-Third party system.

Checked for dumps in SAP XI where in I could get the following message " Error in ABAP Program "SAPMSSY1"and the program is terminated Probably due to an error in program .this is a standard Program and moreover this interface has run successful till april end

Please let me know your suggestions to clear off the sysfail status