CPXERR_EXTRA_FX_BOUND

1454 Line %lld: 'FX' bound type illegal when prior bound given

#define CPXERR_EXTRA_FX_BOUND 1454

A column with either an upper or lower bound previously assigned has an illegal FX bound assignment. Since the FX bound type fixes both upper and lower bounds, no additional bounds can be specified. Check the MPS file.