Hi,
It is not clear for me in which process the problem occurs (InfoPackage or DTP) and on which SAP BW release and SP level your system is.
Please have a look at the following SAP Notes:
- SAP Note 2096765 - Composite note for hanging Infopackage processes in Process Chains;
- SAP Note 2093582 - Composite note for hanging DTP processes in Process Chains.
Best regards,
Sander