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.mgl file extension

.mgl
1. Mascopt network graph file.

For more information see:

2. plvdkey management summary file.

A .mgl file is is generated as an output from plvdkey.exe. The file contains information such as the date and time of the run, the number of lines read, and other information.

The application plvdkey.exe may now be obsolete. Details of the .mgl file were originally published at "http://road.hmdc.harvard.edu/docs/node144.shtml"  but that page is no longer available.