Dear all,

I have some issues with Tosca Structures 8.1.3 with Frozen elements sets in a topological optimization.

If I use the trial input file like "picker_arm" located in the Tosca tutorial, everything goes ok.

But if I modify in Abaqus 6.14-5 the Frozen_Elements sets in the input file by reducing the Frozen elements set and saving again the input file, Tosca structure gives back an error during the calculation like:

**** SIMULIA Tosca Structure ERROR **** 
Analysis of the command DVCON_TOPO.Item EL_GROUP = FROZEN is not admitted.
Please ensure that the referenced element group is defined correctly.
**** SIMULIA Tosca Structure ERROR ****
Analysis of the command DVCON_TOPO.Command will be ignored due to incorrect data.
Reading command : OPTIMIZE
**** SIMULIA Tosca Structure ERROR **** 
Analysis of the command OPTIMIZE.Item DVCON = DVCON_FROZEN is not admitted.
​​​​​​​Please ensure that the referenced entryis correctly defined via DVCON_TOPO.

Maybe there is something wrong when I save the input file or there is a bug in the exporting and reading the Frozen Elements sets.

I send you the Abaqus and Tosca input file.

I hope someone could helps me.

Thank you