[Coin-lpsolver] [Bug?] Problem w. matrix construction

[Michael Fölsl]

Hi,  
  
I'm currently trying to adapt Clp for some LP programs which use their  
own wrapper for solvers (currently not OSI). They often   
start by adding empty rows and columns and setting/changing the coefficients

later on in arbitrary order. However, when I try to do this I run on some 
instances into  errors like this (tested under Linux):   
----- 
clp_test: CoinPackedMatrix.cpp:812: int*
CoinPackedMatrix::countOrthoLength()  
const: Assertion `index_[j] < minorDim_ && index_[j]>=0' failed  
Aborted  
----- 
I created a minimal sample (attached)  causing this problem, where I only 
fill the matrix  
and check countOrthoLength(). (Using the normal order works)  
  
Is this a problem with modifyCoefficient()?  
  
Thanks in any case,  
Michael  

-- 
+++ GMX - Mail, Messaging & more  http://www.gmx.net +++
Bitte lächeln! Fotogalerie online mit GMX ohne eigene Homepage!
-------------- next part --------------
A non-text attachment was scrubbed...
Name: error.cpp
Type: text/x-c++src
Size: 1874 bytes
Desc: not available
URL: <http://list.coin-or.org/pipermail/clp/attachments/20030623/8544b6fb/attachment.bin>