Different Mass on .OUT file and on imported file - Free Size Optimization

Hello everyone,

I'm currently running an composite optimization on a part and today I noticed that the mass I get on the .out file and on the model I import after the size optimization is different.

On this optimization, I try to minimize the compliance of the part while constraining the mass between 3200g and 3600g.

Here is what I get on the .out file:

<?xml version="1.0" encoding="UTF-8"?>

Here is what I get on the imported model:

<?xml version="1.0" encoding="UTF-8"?>

While on the output file I get a total mass of 3600 as requested, when I import the model, the total mass is now 5322.

I've searched around, followed tutorials and nothing helped.

I tried opening the *.inc file as suggested on tutorial OS-3400 but the result is the same (the same as if I just import the .fem file resulting from the free size optimization).

I've looked on this forum and I found something about the CMF file instead but after the free size optimization, I only get the *.HM.ent.cmf and not the *.HM.comp.cmf as mentioned here:

https://community.altair.com/community?id=community_question&sys_id=6486883a1b2bd0908017dc61ec4bcbc5

I also tried running the optimization with MATINIT set to 1 on opticontrol but once again, the result is the same...

Can someone please help?

Thank you very much!