The PRM file is a text file that lists parameters used to configure universes creation and SQL query generation in Web Intelligence. There is a PRM file for each supported RDBMS.
PRM files are located in the database folders under
<INSTALLDIR>\win32_x86\dataAccess\ConnectionServer\
Editing .PRM files is described in the Data Access Guide.
To verify which PRM file is used by a universe connection:
The Parameters dialog box appears.
The Test Connection message box appears.
The details of your connection appear in a drop down message box.
This line indicates the file path and name of the PRM file currently used by the active universe.