[Dip] Dip error

Matthew Galati Matthew.Galati at sas.com
Wed Oct 28 20:58:50 EDT 2009


The following mps file is the same as your milp_dnm2 you sent me, but is in a format that the COIN reader understands.

Now, for the blocks file -  which format are you trying to use? How many blocks are you trying to define and which rows do you want in each block?

List
      //---
      //--- The block file defines those rows in each block.
      //---   <block id>  <num rows in block>
      //---     <row ids...>
      //---   <block id>  <num rows in block>
      //---     <row ids...>
      //---

Or

Pair
      //---
      //--- <block id> <row id>
      //---  ...
      //---


From: dip-bounces at list.coin-or.org [mailto:dip-bounces at list.coin-or.org] On Behalf Of Ayse Durukan
Sent: Wednesday, October 28, 2009 5:30 PM
To: dip at list.coin-or.org
Subject: [Dip] Dip error

Dear All,
I tried to solve a block angular structured problem using Dip, but I got an infeasibility error for one of the subproblems, which is not true in reality.
To be able to see what the problem is, I generated a very small example. I first wrote it in GAMS then converted it into mps format using GAMS. Then I wrote the block file and tried to solve the problem. First I got some errors while reading the mps file; after removing problematic lines I got another infeasbility error.
I attached mps and block files for the small example. I will apreciate if anyone has any idea about what the problem is.

Thank You
Ayse
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