"A technical error during invocation : Could not invoke service reference" Error message while calling a service from BPM

Hi Experts,

We are facing a issue while calling a Automated activity from BPM process, the process gets suspended and the BPM logs says "Process XYZ suspended, A technical error during invocation: Could not invoke service reference name fdhueoegghejietyhsjk6886 Component name ABC " We have already checked the mapped service reference and provider system. Gone through the below link, but no help.

http://http://wiki.scn.sap.com/wiki/display/TechTSG/Sending+a+message+from+SAP+NetWeaver+BPM+process+to+PI+fails+via+automated+activity?original_fqdn=wiki.sdn.sap.com

Any pointers or suggestions to fix up this issue will be highly appreciated. Thanks in advance.

Regards,

Mohit Jaju