Hey @usifohsaturday,
I think you use the data available at gem-global-active-faults/shapefile at master · cossatot/gem-global-active-faults · GitHub. I just tried this, and the conversion seems to work for me.
Please keep in mind that a shapefile is not one single file, but there are several files with different extensions that are all important and should be placed in one folder. If I only have the file with the extension *.shp I get an error that has similarity with the one you posted.
Besides this
- You should use the converted file
faults.gmtfor plotting. - The usage of
EOFhere is not clear to me. - After using
gmt end show, callinggmt endis not needed.