[Dip] Memory Access Error

[Kipp Martin]

Hi Matt:

If you want you can duplicate the error in SmallIP_DecompApp2. It 
exhibits the same behavior. I attach the code. I took your code and added

#include "DecompAlgo.h"

to the start and then in sovleRelaxed() added

	DecompAlgo* algo = getDecompAlgo();

	const double * masterDualSol    = algo->getMasterDualSolution();
	const double * masterPrimalSol = algo->getMasterPrimalSolution();
	double masterObjValue = algo->getMasterObjValue();

Cheers

>> Then, use the access methods in there, e.g.:
>>    const double * masterDualSol    = algo->getMasterDualSolution();
>>    const double * masterPrimalSol = algo->getMasterPrimalSolution();
>>    double masterObjValue = algo->getMasterObjValue();
>>
> 
> I spoke too soon saying thins worked. When I try the above it crashes:
> 
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
> 0x006f8ef0 in DecompAlgo::getMasterObjValue (this=0x6039200) at 
> /Users/kmartin/coin/dip-trunk/vpath-debug/include/coin/DecompAlgo.h:662
> 662           const double * objCoef = m_masterSI->getObjCoefficients();
> (gdb) backtrace
> #0  0x006f8ef0 in DecompAlgo::getMasterObjValue (this=0x6039200) at 
> /Users/kmartin/coin/dip-trunk/vpath-debug/include/coin/DecompAlgo.h:662
> #1  0x0000842f in OSDipApp::solveRelaxed (this=0xbfffeab4, whichBlock=0, 
> redCostX=0x6050200, convexDual=9000000000000000, vars=@0xbfffe968) at 
> OSDipApp.cpp:609
> #2  0x0001c802 in DecompAlgo::solveRelaxed (this=0x6039200, 
> redCostX=0x6050200, origCost=0x6013e00, alpha=9000000000000000, 
> n_origCols=1640, isNested=false, algoModel=@0x59a5b04, 
> solveResult=0xbfffe2b8, vars=@0xbfffe968) at 
> ../../../Dip/src/DecompAlgo.cpp:6181
> #3  0x00029df7 in DecompAlgo::generateInitVars (this=0x6039200, 
> initVars=@0xbfffe968) at ../../../Dip/src/DecompAlgo.cpp:2586
> #4  0x000286a8 in DecompAlgo::initSetup (this=0x6039200, 
> utilParam=0xbfffee1c, sectionParam=@0xbfffea28) at 
> ../../../Dip/src/DecompAlgo.cpp:280
> #5  0x006effc5 in DecompAlgoPC::DecompAlgoPC (this=0x6039200, 
> app=0xbfffeab4, utilParam=0xbfffee1c, doSetup=true) at 
> /Users/kmartin/coin/dip-trunk/vpath-debug/include/coin/DecompAlgoPC.h:242
> #6  0x00002cb0 in main (argc=1, argv=0xbfffef00) at OSDip_Main.cpp:80
> 
> 
> Thanks
> 
> 
> 


-- 
Kipp Martin
Professor of Operations Research
and Computing Technology
Booth School of Business
University of Chicago
5807 South Woodlawn Avenue
Chicago, IL 60637
773-702-7456
kmartin at chicagobooth.edu
http://www.chicagobooth.edu/faculty/bio.aspx?person_id=12825325568
http://projects.coin-or.org/OS
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