I trying to implement Staging by using HOLD command for dumping data to relational databases.
Documentation explicitely says that when you use HOLD Command a HOLD Master File will be created at the moment of execution of the report.
Could you please tell us where do we find the .mas and .acx corresponding to the HOLD Master File mentioned above.

Thanks

The master file is being created in the temporary directory under edatemp that the session files are in. If you want to save it to use later, you need to do something like:

APP ENABLE
APP MAP FOCHOLD path/on/your/hubserver
APP HOLD FOCHOLD

in order to place it in the directory that you are saving your HOLD file to.

There won't be an .acx file, since the HOLD file is "local" on your hub.

You should find more information under "APP MAP" in the documentation.