[Solved] Why does increasing the size of parts lead to an error?

General Questions
2

If you scroll higher in the job monitor, you will see more specific error messages:

 *ERROR in cascade: zero coefficient on the
        dependent side of an equation
        dependent node: 17543        direction: 0

 new coefficient = 1.000000e-05
 *ERROR in cascade: zero coefficient on the
        dependent side of an equation
        dependent node: 111        direction: 0

 new coefficient = 1.000000e-05
 *ERROR in cascade: zero coefficient on the
        dependent side of an equation
        dependent node: 113        direction: 0

 new coefficient = 1.000000e-05
 *ERROR in cascade: zero coefficient on the
        dependent side of an equation
        dependent node: 114        direction: 0

Use Tools → Find to locate these nodes. They are all located in this region:

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So you should check the tie constraints there and look for an overconstraint - multiple tie constraints using the same surfaces in a conflicting manner.

In this case, it’s “Solid_part-1_to_Solid_part-7” and “Solid_part-7_to_Solid_part-2”. The same face is used once as master and once as slave. You can try this to get rid of the errors:

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But (especially when using the Search contact pairs tool), you should check all the tie constraints for such conflicts and modify them if needed. It’s also recommended to always run a frequency step to check the connections in assembly models. And read all the warnings in the job monitor.

The calculation fails