Troubleshooting: SOAP Runtime: SOAP Fault exception occurred in program...

Guys,

I have a series of RFC FM exposed as webservices. They all work fine. This morning at around 8:00 am, we started to get exceptions (in SM21).

SOAP Runtime: SOAP Fault exception occurred in program CL_SOAP_RUNTIME_SERVER

How can I troubleshoot this? Where do I go for more details? I have no dumps or entries in ICM trace files (level 1).

Any help is greatly appreciated.

Thanks

Leonardo De Araujo