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*Numerical problems* or stability problems* may arise during analysis. If so, the log file should be reviewed. Information may be retrieved using the standard solver, available through Analyze > Set Analysis Options > Solver Options. Numerical problems should be fully resolved before analysis results are interpreted.

When {new-tab-link:http://www.csiberkeley.com/}CSI{new-tab-link} Software encounters zero stiffness, a warning message will indicate that a small stiffness value has been assigned to allow numerical formulation to proceed. The model should still be checked to identify and remove the source of zero stiffness.


{list-of-resources2:label=numerical-problems|drafts-root=Numerical problems drafts}


h1. See Also

* {new-tab-link:http://www.csiberkeley.com/}CSI{new-tab-link} [_Analysis Reference Manual_|doc:CSI Analysis Reference Manual] (Frame Element > End Releases > Unstable End Releases, page 116)
* [Numerical instability|etabs:Numerical instability]