Optistruct ERROR 155

kkandra

Hi,

I was working on optistruct and came across a new error and error description is given below:

A fatal error has occured during computations:

*** ERROR # 155 ***

Three numerical factorization in a row failed. Probable cause

is that there is a massless mechanism in the model.

Solver error no. = -729

subcase id = 1

Check the model and rerun the problem.

(osdiag,46,1 may be used to check for massless rigid body modes.)

(WARNING: results obtained with osdiag,46,1 cannot be used because

the model is changed internally.)

Can someone help me please?

Altair Forum User

I am having the same eeror message.

I am just doing few experiment with RADIOSS for a few linear modal models.

This is the error message:

A fatal error has occurred during computations:

*** ERROR # 155 ***

Three numerical factorization in a row failed. Probable cause

is that there is a massless mechanism in the model.

Solver error no. = -729

subcase id = 3

Check the model and rerun the problem.

(MECHCHECK may be used to check for massless rigid body modes.)

(WARNING: results obtained with MECHCHECK cannot be used because

the model is changed internally.)

...

I have deleted the MPC parts in my model and now it is running.

What it is wrong with my MPCs? Model check was saying that they were OK????

Any help?