[Insight-users] vnl_svd suspicious return value error

[frankmiller at jhmi.edu]

Sandy,

I've had issues with vnl_svd on my Xeon system in the past that went
away when I compiled itk with more conservative optimizer settings.
With gcc the problem went away when I used -O2 instead of -O3.

Give it a try.  

Frank

On Thu, Apr 26, 2007 at 01:13:08PM -0400, Sandhitsu Das wrote:
> While executing the following code segment
> 
> this->m_RefinedLatticeCoefficients[i]          = ( vnl_svd<RealType> 
> ( R ).solve( C ) ).extract( 2, C.cols() );
> 
> I get the following runtime error:
> 
> /InsightToolkit-2.8.1/Utilities/vxl/core/vnl/algo/vnl_svd.txx:  
> suspicious return value (4) from SVDC
> /InsightToolkit-2.8.1/Utilities/vxl/core/vnl/algo/vnl_svd.txx: M is 4x4
> M = [ ...
> 0.1666666666667  0.6666666666667  0.1666666666667                0
> -1.0000000000000                0  1.0000000000000                0
> 2.0000000000000 -4.0000000000000  2.0000000000000                0
> -1.3333333333333  4.0000000000000 -4.0000000000000  1.3333333333333  ]
> 
> This happens on a variety of linux systems (P4, Xeon, Opteron), but  
> not on Mac OS X. RealType is double. Is there a fix for this other  
> than digging dip into netlib code and changing things as suggested in  
> vnl_svd.txx ?
> 
> Thanks for any help,
> Sandy
> 
> 
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