I have made major changes to the code to use FORTRAN 2008 features to change how the PIMs were addressed. These changes make the code much more readable and easier to modify and add data types, and should not be noticed by users. The current version of MARK is 10.0, August 4, 2022.
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I'm going to update the version of the MARK installer that is currently available on PhiDot to this newest version (10.x.x). If you have any problems with the new version (there shouldn't be - in theory), post them here.