Error#292 - Available working storage insufficient

Altair Forum User

Hi everyone,

 

I am currently running a pre-stressed modal analysis using Altair Optistruct. The first loadcase is a LGDISP non linear quasi static analysis and the second loadcase is a normal modes analysis which is PRETENS with loadcase#1.

The model comprises of friction, freeze and slide contacts, 2nd order tetrahedral elements, CBEAM elements and RBE2 elements. 

Everything has been checked but something strange happens when I run it into Optistruct: 

If I change the order of the tetrahedral elements from 2nd to 1st, I get the following error:

 

 OptiStruct error termination report printed to file
 'def_linear2.stat'.
 PROGRAM STOPPED DUE TO ERROR.
  
 NOTE # 1422
 There were 1 automatic memory expansion(s).
 (The result is not affected by this.)
  
************************************************************************
  
 A fatal error has occurred during computations:
  
  *** ERROR # 292 ***
  Available working storage insufficient.
  

 

The strange thing is that if I run the 2nd order the simulation proceeds and starts as it should.

 

At first I corrected all RBE2 free-nodes and deleted any duplicate elements. Unfortunately, this keeps happening.

 

Please, I COULD USE some feedback asap.

If there is any need to share something, I would consider using file transfer. I am attaching the .out file.

 

Thank you in advance for your consideration. 

 

Matteo

 

Unable to find an attachment - read this blog

Rahul Rajan_21763

1. Try to force in-core solution using –core in.

2. Disable dynamic memory allocation and set the total allowable static RAM using -fixlen.

Before fixlen you can run the check to see what memory it allocates too.

 

If possible try running in latest version OptiStruct 2018.0.1

Altair Forum User

Dear Rahul,

 

Thank you for your kind reply. What is this error due to?

A further update: I have seen that if I run only the non linear analysis part only, the analysis starts smoothly.

So, apparently, only if I impose a pretensioned modal analysis, the error comes out.

 

I have one question: how do I disable memory allocation? Do I have to use fixlen or is there another command I should type in?

 

Rahul Rajan_21763

Working storage means the memory, not the disk space. For now, please allocate more memory with -minlen.

Altair Forum User

Dear Rahul

 

Thank you for your reply. I have tried using fixlen some days ago and it worked! Thank you very much!

Rahul Rajan_21763

Thanks for the update.