Negative Jacobian error message on Modal Analysis

[eijimene]

Every time I attempt to run a modal analysis on my model I get the error message:
* * * E R R O R * * * (WHILE RUNNING ANALYSIS)
NEGATIVE JACOBIAN ENCOUNTERED,
CHECK ELEMENT CONNECTIVITY AND JOINT COORDINATES FOR ELEMENT 1147

Now, I have two questions. How could I find an element in etabs and someone knows why did it happened this error.

 

[MrHershey]

Not sure how you would find individual elements. But hopefully this thread helps a little anyways.

 

[eijimene]

thanks, I am gonna check it now.

 

[johnbridge231]

Perhaps trying to use the Ritz method could fix your issue...

Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis

http://www.engissol.com/cross-section-analysis-design.html