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Problem with DDI derivative

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Old   April 15, 2020, 09:56
Default Problem with DDI derivative
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Horst van Gras
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I would like to do a time derivative in tecplot. For this I tried to make a derivative from the zones using indices derivatives DDI. However it gives the error that "DDI is not avaible for FE Grid". But the manual refers to FE Grids "For finite-element zones, spatial derivatives are calculated using the Moving Least-Squares technique", this doesn't make sense for me.

Does anyone had the same problem?

Thx in advance!
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