Definitely the first thing you should do is get the latest version of the software - there is no point analyzing and solving a problem in an old version of the software.
My first reaction was to go to the GeoModeller website ...
http://www.geomodeller.com/geo/index.php?lang=EN&menu=homepage
... and then navigate to the downloads section. However, I see that the version that is available there is v1.3.2 ...
If you/Shell are meant to have access to v2.??, which is where GeoModeller is up to (as of the November 2011 User Meeting), then you should contact Intrepid Geophysics to arrange access. Version 2 is a significantly different (better) version, which too many updates and changes to mention here.
And to Intrepid Geophysics - UPDATE THE DOWNLOADS SECTION OF THE GEOMODELLER WEBSITE
Regards ... Richard Lane
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Try to open the binary file and check if there is any undefine number
you may find in the bottom of the file.
Good luck ..
Abdulghani