Vertical Mapper Classified (GRC) bad export


I exported my clutter file to .GRC (Export->Raster->Vertical Mapper Classified/Clutter Grid File), it finishes successfully.
But when I try to load it back to Global Mapper or my MapInfo Based radio planing software (Mentum Planet) I get an error:

Error loading file

Stack Trace:

0000001407E26C (global_mapper)
(30 more lines like this)

I have many GRC files from other non Global Mapper related sources that work with no problem.

I would really appreciate if you could help me fix this issue because the main reason I bought GM is for the .GRC / .GRD formats.

( Global Mapper 17.0.1 - 64 bit )



  • bmg_bobbmg_bob Global Mapper Programmer Posts: 2,002
    I recommend getting the latest release of Global Mapper to see if the problem has already been fixed -- I seem to recall that we fixed an issue with .grc files a while back.

    If the problem persists in the latest release, then your best bet is to send an e-mail describing your workflow and the results (error message, etc.), with a copy of your sample data, to Blue Marble Geographics support ( This will ensure that the support team sees the problem and can provide a timely response. Thank you.
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