Error While RFC Lookups

Hi

I am performing RFC Lookups in my java code and when ever I am testing this java mapping code from Operation Mapping Test Tab, I am getting following error.

Error while lookup Connection to system RUNTIME using application RUNTIME lost. Detailed information: Error accessing "http://pmichsappid16.app.pmi:8016/run/system/int?container=web" with user "PIREP_PID". Response code is 500, response message is "Internal Server Error"

Error while closing accessor Technical error when calling an adapter remotely. The HMI method with the ID close was called with an incorrect session status. The system accessor object is missing.

Could you please tell why I am getting this error.

Note:1) When I am testing it end to end my code is working fine with out any errors.This happens only when I am testing it from operational mapping test tab.Previously I am able to execute my code from operational mapping test tab also.

2) I am also closing accessor object in proper manner.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PI 7.1 Strange behaviour!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!