[Clp] Help - Input file .lp doesnot run

Francois Margot fmargot at andrew.cmu.edu
Mon Jul 16 12:20:11 EDT 2012


Hi Jack:

 > I need some help. I´m testing a problem in Clp, I wrote it in .lp to 
 > input but the Clp doesn´t recognize the name of the constraints.
 >
 > I thought my .lp was wrong, but it works perfectly on GLPK, and it
 > finds the optimal solution (obj 5169.13). I tried all the
 > combinations I could imagine and all didn´t work. Clp tell the name
 >contains illegal character ":", which the documentation tell, it works
 > to identify the end of the name of each constraint.

 > I have no idea how to solve this. The file is attached on email. The
 > Clp version was 1.14.4.

 > The most strange thing is I used GLPK to convert the .lp file to .mps 
 > and solved it on Clp. It works! So, I thought it could be some
 > problem with the .lp files.

 > All the constraints name are according to the function
 > is_invalid_name( ). It must return 0 to all of them.

 > It should be something stupid but I have no idea what it could be. I
 > think that´s something wrong in the line 5.

 > Does somebody know what how can I solve this problem?

The problem is that there is a white space between '-' and '1250' in the 
rhs of constraint a2.

Francois


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