MPCORecorder Error: invalid response data size

[popovic]

hi.. I have problem with MPCORecorder, when I run my model, the .exe window says MPCORecorder Error: invalid response data size, and the fiber section data does not come out

Can someone help me?

[STKO Team]

It looks like the initStrain material has an issue with the number of components it gives as output.
Use the initStress instead (using an initial stress equal to your initial strain times the young's modulus):

IS.png (16.83 KiB) Viewed 2274 times

This has the same result as long as the init strain is less than the yield strain (which is the case in your example)

[popovic]

Thank you very much, it helps a lot

[STKO Team]

You're welcome

[BuuNguyen]

Dear STKO, I got the same problem if I select "element results (force)" in MPCORecorder

1/ Can you pleease check the attached file and give me a solution for it?
2/ How can I show the stress of the fiber section? (stress time history)

Thank,
Buu

[STKO Team]

it's because you are using the Triangle element and it has a similar issue to the initStrain material for the "force" output.
No worries, that output is generally not useful.
If you want to visualize stress use the material.stress output

[BuuNguyen]

Yeah, I see, Thank you very much for your support,
Buu

[STKO Team]

You're welcome