After installing Discover MapInfo Pro Bundle, my custom MapInfo Pro Projections are deleted.


After upgrading the Discover MapInfo Professional Bundle, all
custom MapInfo Professional projections have be deleted.


The Discover MapInfo Pro Bundle 2012.0.2 maintenance release (available January 2013) 
includes a fix to prevent the deletion of the previous MapInfow.prj.

At the conclusion of the updating process a copy of the previous MapInfo Projection file is now placed in the User's Temp folder, called  'MapInfow_old.prj'.

To quickly locate the user temp folder, open Windows Explorer and type the following syntax into the Address Bar:


The same process will also need to be applied to the Encom.prj file, a backup will be located in the same folder as the current updated Encom.prj file.

By default this is located in -


It is best practice to not simply copy and paste the entire contents of the saved projection file over the top of the newly installed projection file, as any new projections added by MapInfo Professional may be deleted.
Instead, locate your custom projection lines within the 'MapInfow_old.prj', and copy these manually into the new MapInfow.prj file located in your MapInfo Professional Program directory.

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Last Updated on: 1st of November, 2018