Originally posted by: JungS

Hello,

I am using Python to write a model and trying to convert MIP model to LP.

I simply thought I could change the variable type from " binary " to "continuous" and solve it.

But, CPLEX still recognize the model as MIP.

What else should I check to solve the model as lp ? 

Or is there any way I can force the model to use LP?

If there is an error coming up after forcing to use LP, then I can find my mistake easier.

Here is a simple script using the CPLEX Python API to read in a model from the command line, convert it to an LP, and then write the LP file to disk:

import sys
import cplex

c = cplex.Cplex(sys.argv[1])
print("Original problem type:", c.problem_type[c.get_problem_type()])
print("Converting to LP....")
c.set_problem_type(c.problem_type.LP)
c.write("problem.lp")