The Integration Service variables (such as $PMRootDir , $PMSourceFileDir , etc), can be changed as follows:
Log in to the Administration Console.
Select the Integration Service.
Select the Processes tab.
Click Edit .
Enter the value for the server variables ( $PMRootDir , $PMSourceFileDir , etc) here.
Click OK .
When $PMRootDir is modified, the Integration Service must be disabled first and then enabled after the modification for the changes to take effect.
Minnu's Blog on Informatica & Data warehouse concepts
Monday, June 9, 2008