[Coin-symphony] How to dump to MPS?

[francois dionne]

Dear mailing list,

I'm working on a series of four mixed integer problems. Some of the 
variables are continuous, some
of them are zeros and ones and some of the variables are integers other than 
zero and one. I'm
using Symphony in combination with several software packages.

According to my model, at least one problem should be feasible, but the 
Symphony solver never
gets past the root node in any problem.

The problems are all generated by C++ software that I wrote using the 
Symphony API. What I'd like
to do is to dump the problem to an MPS text file using the function:

void write_mps(LPdata *lp_data, char *fname)

, as suggested in the Symphony manual. Then I can examine it by hand or with 
another solver.
So here's my question: where do I get this LPdata object? The Symphony 
manual is unclear about this.

I hope you can help. Goodbye and thanks in advance.