Hello,
Old post, and i hope you have found a solution.
Today I have got the same problem as you. On Debian Gnu/Linux 64Bits
I have made a really ugly and dirty fix for export to Gcode
In sliceRun.py
just before the last line (return subprocess.Popen.... )add the line:
cmdList[0]=os.path.abspath("/usr/bin/pypy")
For an admin/Cura developper:
On debian 64Bits the first parameter of cmdList is '/usr/lib/pypy", it's a directory...
The reel path is /usr/bin/pypy.
Thanks
Regards