[Coin-bcpdiscuss] Interfering with the LP solver in BCP

[Laszlo Ladanyi]

Hi Soumitra,

If you change everything back as they were then BCP should be fine with this.
However, you might find it easier just to clone the solverinterface, change
the integrality in the new instance, solve the MIP there then abandon th new
instance. That way you are definitely safe; the code will probably be shorter
and cleaner; and you don't sacrifice much efficiency since the time needed to
solve the MIP will dominate the time needed for copying by far. 

Hope this helps,
--Laci

On Mon, 2 Apr 2007, Soumitra Pal wrote:

> Hi,
> 
> I am using BCP to solve the cutting stock problem using 
> branch-and-price. I want to make the following experimentation. Just 
> before branching, I want to solve the restricted master problem (RMP) as 
> an integer programming problem. This is different from the usual 
> procedure because there we solve the LP relaxation of the RMP not the 
> RMP itself.  This, I could do by changing the variables as integers and 
> solving using the solver. However, I am worried if this will affect the 
> working of BCP in subsequently. I want to know what are the precautions 
> I have to  take.
> 
> Thanks,
> Soumitra.
>  
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