Error in importing RFC into ESR from PI system itself

Hi Experts,

I have a scenario that needs to send log info, which is stored in PI itself, to WebSphere via SOAP. The RFC has been developed in PI, which reads data from a custom table and uses FM SXMB_SELECT_MESSAGES to retrieve messages that have not been updated to the table yet.

The communication is between PI (RFC) and WebSphere (SOAP). When I tried to import the RFC into PI (design), the following error occurred and prevented it from importing. Part of the error message is listed below and the error log file can be found in the attachment. Has anybody experienced the same issue? It is appreciated if you could shed some lights on this.

DDFactory could not be instantiated: Check you backend connection

com.sap.aii.ib.sbeans.upload.RemoteUploadException: DDFactory could not be instantiated: Check you backend connection

at com.sap.aii.ib.server.upload.UploadServiceBean.openSAPSource(UploadServiceBean.java:88)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:592)….

Thanks in advance for your help,

Shawn