BPM - ERROR while Activating Integration Process

Hi,

I am unable to activate my Integration Process if i use Transformation step between Receiver and Sender step.

The ERROR Log is given below:

Activation of the change list canceled

Check result for Message Mapping Msg_Mapping_BPM_File | http://sap.com/xi/File_BPM_File:

Starting compilation

Compilation complete

Check result for Integration Process Integration_Process_BPM_File | http://sap.com/xi/File_BPM_File:

Expression must return the interface type MI_Outbound

Check result for Integration Process Int_Process_File_BPM | http://sap.com/xi/File_File_BPM:

Source parameter MI_File_Outbound | http://sap.com/xi/File_File_BPM not set

Target parameter MI_File_Inbound | http://sap.com/xi/File_File_BPM not set

Regards,

Prashanth