Opened 11 years ago

Last modified 7 years ago

#2466 new defect

Over-determined system — at Version 2

Reported by: Nimalk Owned by: probably noone
Priority: high Milestone: Future
Component: Backend Version: trunk
Keywords: Cc: Lennart Ochel

Description (last modified by Lennart Ochel)

When setting the initialization parameters for the Multibody components the system becomes over-determined. E.g. by setting the r_0 parameter for the bodyShape component.

When instantiating model:

"Check of test completed successfully.

Class test has 915 equation(s) and 921 variable(s).
618 of these are trivial equation(s).
"

and when simulating:

Symbolic	14:57:07		0:0-0:0	Too many equations, over-determined system. The model has 924 equation(s) and 921 variable(s).

A notable thing is that the numbers of equations, when instantiating and simulating, are not the same.

Furthermore, the number of variables and equations are not the same, when just using a bodyShape and a world component without connecting them together.

"Check of test1 completed successfully.


Class test1 has 912 equation(s) and 921 variable(s).
615 of these are trivial equation(s).
"

Change History (2)

comment:1 by Lennart Ochel, 11 years ago

Cc: Lennart Ochel added

Check model counts only the variables/equations of the simulation. Hence, this may differ for the initialization (your error message during compilation is probably related to the initialization). But, if the number of equations/variables do not even match for simulation, this needs to be fixed first.

Last edited 11 years ago by Lennart Ochel (previous) (diff)

comment:2 by Lennart Ochel, 11 years ago

Description: modified (diff)
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