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answered 1 year ago

Max Alekseyev gravatar image

As it was pointed out in the issue 37365, the reason for this behavior is the inability of Sage to recognize QEPCAD's error in the non-interactive mode.

The error can be seen in running QEPCAD in the interactive mode with interact=True, or in verbose mode with verbose=True, although the latter is currently broken. Alternative is to use parameter logfile='myfile.log' and inspect the file myfile.log afterwards. Under Linux it's also possible to specify logfile='/dev/stdout' as an alternative to verbose=True.

The error in this case is "Too few cells reclaimed". The number of cells is controlled by memcells= parameter to qepcad(), although increasing it in this case up to 10^8 does not seem to help.