FAQ 004605 | After importing an .stp file, my model is unstable. What can be the reason for this?

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After importing an .stp file, my model is unstable. What can be the reason for this?


There can be many reasons for that. Your model may have tension members and you did not deactivate the "Connect Crossing Members" option during the import.

Figure 01 - stp-Import - Settings

Your model is unstable at the crossing points of tension members.

Figure 02 - Error - Crossing, Connected Tension Members

If I deactivate this option, I still get an error message. Why?

The calculation parameters were probably not adjusted sufficiently in the file before. Tension members often require a special treatment, which can be added in the calculation parameters.

Figure 03 - Error - Missing Settings in Calculation Parameters

Further information to find out the reasons for the instabilities is described in this FAQ.


Dlubal FAQ stp import Unstable Tension member Frequently Asked Question FAQ about Dlubal Question and Answer about Dlubal


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  • Updated 09/02/2020

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