[Cbc] Questions about originalColumns method of CbcModel

[John Forrest]

Noam,

I presume you are passing a command line into solver.  If it has 

-preprocess strategy

then at present originalColumns_ is not set.  It probably should be e.g
after line 630 of CbcStrategy.cpp -
model.setOriginalColumns(process.originalColumns(),numberColumns);

With normal preprocessing then setOriginalColumns should be called at
3871 or 3875 (2.7/trunk) - check that code gets there.

Also make sure that your code is pointing to processed CbcModel not
original one.

John Forrest
On Mon, 2011-10-17 at 14:08 -0500, Noam Goldberg wrote:
> Hello,
> 
> I am running with Cbc using settings similar to driver3.cpp the examples directory.
> I have my own Cgl cut generator implemented and would like to use CbcModel::originalColumns() method to try to map from the processed columns that I am getting through OsiSolverInterface object passed to the generateCuts() method back to the original columns. However it seems that the original columns is not set i.e. NULL is being returned. 
> Also is there a method for obtaining the inverse "processedColumns"?
> 
> Thank you in advance,
> Noam
> 
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