Description:
imexutil.sh can operate against other dSeries servers besides the installation it belongs to. While it's highly recommended to use the imexutil.sh of it's own version to do import/export, eg. R5 imexutil.sh for R5 dSeries server, R11 imexutil.sh for R11 server, etc.
When the above rule is not followed:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: invalid method hash
Solution:
It's highly recommended to use the imexutil.sh for the version for which it is meant for to do import/export, eg. R5 imexutil.sh for R5 dSeries server, R11 imexutil.sh for R11 server, etc.