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

[Shahin Gelareh]

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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