# KSP_DIVERGED_NONSYMMETRIC
It appears the operator or preconditioner is not symmetric and this Krylov method (`KSPCG`, `KSPMINRES`, `KSPCR`) requires symmetry 


## See Also
 `KSPSolve()`, `KSPGetConvergedReason()`, `KSPConvergedReason`, `KSPSetTolerances()`


## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petscksp.h.html#KSP_DIVERGED_NONSYMMETRIC">include/petscksp.h</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/include/petscksp.h)


[Index of all KSP routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
