Calling a new FM in Inbound Proxy is giving CX_SY_DYN_CALL_ILLEGAL_TYPE

Hello,

I am trying to call a new FM in my Inbound Proxy (Synchronous). I am passing all mandatory parameters.

Error:

An
exception with the type
CX_SY_DYN_CALL_ILLEGAL_TYPE occurred, but
was
neither handled locally, no

When I debug the proxy, the control does not even go into the FM, it just throws the exception. I am using other FM's in the Proxy. This has worked some time back but is giving these errors from 2days. Your help is appreciated.

Thanks,

Vijay.