[Dip] The variables is not in the union of blocks

[Matthew Galati]

Y_i is a master-only constraint and must be identified as such. Are you building your own app? Or using MilpBlock app? If the latter, DIP should take of it for you. 

Sent from my iPhone

On Sep 14, 2011, at 6:13 PM, Shahin Gelareh <shahin.gelareh at gmail.com> wrote:

> Hi everybody,
> 
> Let assume the following mip:
> 
> min   cx
> 
>         x_ij < z_i
>      y_i +   x_ij+x_x_ji <= 2
> all binary except y positive
> 
> we consider the first set of constraints to be decomposed to one block per i and let the second remain in the RMP.       
> Then after implementing this in DIp I get the following errors:
> 
> -----------------------------
> Column     0 ->                      y(0) is missing from union of blocks.
> etc..............
> -----------------------------
> apparently this is because y_i does not appear in any block?
> Any one has an idea?
> 
> regards,
> Shahin
> best regards,
> Shahin
> 
> 
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