Options file for License Manager will not work, even when formatted correctly

Description

A correctly formatted options file is not being read by the License Manager.
The following line can be found in the "lmgrd9.log" file, which is present in the following locations:

• Windows

C:\Program Files (x86)\ArcGIS\License10.x\bin in windows or $HOME/arcgis/license10.x/bin

• Linux:

(ARCGIS) Using options file: "="

Cause

The ports on the License Manager have been 'locked' down improperly.

Solution or Workaround

1. Check the Service.txt file  in the License Manager\bin folder.
2. Remove the spaces after the word PORT and after the equal sign (=).
3. Save the file.
4. STOP and START the License Manager.

The previous line in the "lmgrd9.log" that read " (ARCGIS) Using options file: "="" should now contain the path to the "ARCGIS.opt" file. The options file should now be working.