LP File Format

[Scott J. Mason]

I have a large .lp file (I could also generate a .mps file) that I'd
like Gurobi to analyze. Can it do this? I am evaluating the command
line, executable version of Gurobi. Thanks!

[Greg Glockner]

Yes, Gurobi can solve both LP and MPS files. Information supported file formats can be found in:

http://www.gurobi.com/html/doc/refman/node383.html

If your model contains double-precision numerical coefficients (ex: many digits after the decimal point), MPS format is recommended. Otherwise, either LP or MPS formats can be used.

As for solving a model from the command-line, there are two options. Full control is available through the Interactive Shell, while a simple interface is available through the gurobi_cl command. These are both described in:

http://www.gurobi.com/html/doc/quickstart/node3.html

[Scott J. Mason]

However, I have generated .lp files using GLPK and CPLEX and Gurobi
can't read either of them. I have generated .mps files (both free and
fixed format) using GLPK and Gurobi can't read either of them.
Thoughts?

[Scott J. Mason]

Sorry, I got it to work, disregard!

[Greg Glockner]

> Could anyone comment on why the .LP file type works in the Interactive Shell but not via the object model (I am using .NET). I can't seem to get it to work with a GLPK .LP file.

Can you provide details? What do you mean when you say it's working in the shell but not with the .NET API?

[Greg Glockner]

Use the GRBModel constructor; see "Load and solve a model from a file" in the Example Tour:

http://www.gurobi.com/documentation/5.0/example-tour/node2