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The first calculated eigenfrequency of the full Design Space is lower than the chosen frequency constraint. The optimisation logic isn’t able to reduce material in this case. There is a workaround on the frequency help page.

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Detail specified together with either complexity or resolution - using detail for optimization

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Access to a specific file was denied. The file couldn’t be deleted.

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symmetry not supported with frequency conditions

The hard symmetry isn’t supported for eigenfrequency optimisations.

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condition-based frequency-analysis event … must have at least one condition

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Please adjust the Intensity value of the Support Reduction according to the boundaries.

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invalid supportReductionMode … expected off, passive, reactive or active.

Please set the Support Reduction Mode to one of the supported modes.

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missing / incompatible strutDensity setting for use with support avoidance.

If you are using the Support Reduction, you need to define a Strut Density.

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Permanently shutting down soft symmetry because all dimensions have become unsalvagably asymmetric.

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LicenseConstraintException    failed to acquire … count … instances of … feature.

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Please contact the MSC support.

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feature … is unavailable

Please contact the MSC support.

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Nastran requires paths to not contain space characters under GNU/Linux

Please do not use space characters in paths under Linux.

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symmetry not supported with frequency conditions

The hard symmetry isn’t supported for eigenfrequency optimisations.

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Unknown shapeQuality …

The shapeQuality name in the configuration file is unknown.

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Please use nast20233(.exe) (or the matching executable for your installed nastran version) for frequency analysis

nast20233w.exe isn’t suitable for the frequency optimisation

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failed to execute nastran sub process

For eigenfrequency optimisations MSC Nastran is called in the background. In this case Nastran cannot be executed.

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failed to run nastran successfully

For eigenfrequency optimisations MSC Nastran is called in the background. In this case Nastran cannot be executed sucessfully.

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mesh conversion from amendate to cgal failed

The smoothing algorithm failed. Please contact MSC support.

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galMesh have poligones with more that three vetices

The smoothing algorithm failed. Please contact MSC support

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out of bounds

The smoothing algorithm failed. Please contact MSC support

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Requested nastran operation but did not specify nastran service. Please set env variable 'EMENDATE_SERVICE_NASTRAN' to point to your nastran binary.

If you want to execute a frequency optimisation directly in the command line, you have to set a environment variable which points to the nast20233.exe

EMENDATE_SERVICE_NASTRAN

C:\Program Files\MSC.Software\MSC_Nastran\2023.2\bin\nast20232.exe

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envName … does not point to a regular file

Please check the environment variable for the MSC Nastran installation

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OperatorFailure operator … crashed

A specific operator crashed. Please contact the MSC support.

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Cannot inflate geometry with zero vertices

This can occur to a current limitation. Please make sure that a point load or a displacement constraint on a point is not applied at the edge of an interface. Increase the Interface or change the load to a surface instead.

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Unfeasible FEM setup: Missing fixation in one or more directions

Check the model set-up. All 3 degrees of freedom have to be constraint.

Escalations

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