error 312

jang
jang Altair Community Member
edited October 2020 in Community Q&A

I got an error when I run optimization.

 

************************************************************************

 A fatal error has occurred during computations:

  *** ERROR # 312 ***
  In static load case 1
  the compliance is negative or large -5.62632e+013.
  Optimization/buckling analysis cannot be performed.
  due to possible rigid body mode.
  INFEASIBLE DESIGN (AT LEAST ONE CONSTRAINT VIOLATED).

  *** SOME ERRORS WERE REPORTED DURING THE RUN,
  *** PLEASE VERIFY RESULTS AS THEY MAY BE INVALID.
  ...


************************************************************************

 

But it didn't have rigids.

Unable to find an attachment - read this blog

Tagged:

Answers

  • Robert Lawson
    Robert Lawson Altair Community Member
    edited December 2019

    Good day jang - 

    You have a several parts here that are not attached to each other.  You can use the tool 'find' (shift F5) to find elements attached.  For instance, 'component1' is not attached to 'auto1'.  So there is no load path from the loads to ground (SPC).  So you are asking OS to solve x=F/K, but K=0 in this case.  

    - Robert

Categories