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Error 4001

I am trying to run an NLGEOM analysis of a 3-point-bending experiment and I get this message some 15 minutes after starting it:

*** ERROR # 4001 ***
Running RADIOSS starter, 1 ERROR and 0 WARNINGs have been detected.
They are listed below.

STARTER ERROR:
ERROR id : 727
** ERROR IN MEMORY ALLOCATION
ERROR ALLOCATING TABLE BUFFSG :

NLGEOM subcase 1, starter finished

Is there any place where I could have access to what the error codes (4001, 727, etc) mean? It's probably just lack of experience from my side, but those messages don't really help me pinpointing the error.

Thank you

Gustavo Blazek

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Altair Forum User

Hi,

can you card edit any one of the element and check if there is any THETA assigned?

if yes and if you are using an isotropic material, please follow the procedure below and run the analysis:

1) go to card image panel (see the image below),

2) change the selector to elements and select the config to QUAD4 (say for example) and click edit

3) as shown in the image below change the THETA field to BLANK.

Altair Forum User

if there is any theta available for elements, while bulk to block conversion huge list of file will be written for each elements.

that means, a separate component and property will be created in the block file (.rad file which can be found in working directory).

this takes a lot of memory.

I suspect this is the cause for the error in your case.

if the message still persists please let us know.

Altair Forum User

Hi,

During bulk to block conversion (NLGEOM) solver writes a separate component and property for each element in the .rad deck and this creates a memory issue.

Since you have orthotrpic properties, please try the below procedure:

1) Create a local system as per your analysis requirement (assuming X major axis)
2) Assign all the elements to the created local system
3) run the analysis
this should reduce the number of components and properties during conversion.

if the error still shows-up we may need your model file. Please use the dropbox link below to share the model:

https://ftin.india.altair.com:8443/filedrop/~BDR1DN

Also,

is there any specific for running a NLGEOM analysis for a 3 point bending model?

can you run the same with NLSTAT and check?

Altair Forum User

Hi again Prakash and Rahul,

I changed my analysis to NLSTAT and increased the size of the mesh so to reduce memory usage. Now the simulation runs smoothly.

Thank you very much for the support and for the tips

Gustavo