[Help-glpk] LPX_E_FAULT

[Manish Jain]

Hi,

I have constructed an LPX object and loaded my model/data in it successfully.

However, a call to lpx_simplex returns LPX_E_FAULT.

Now, this is particularly strange because I get the correct objective value if I call lpx_write_cpxlp in this main program

and lpx_read_cpxlp and lpx_simplex from a different test program.

Can somebody elaborate on this error. The manual says that the initial basis may be invalid; does this mean that I have to manually add slack and artificial variables in my main program but this is not required when the model is read from a file?

Thanks,

Manish Jain
University of Southern California