There is a limitation in SOL106 when attempting to restart a solution that includes thermal loads. Specifically, if the initial or restart solution has thermal loads applied, the software may trigger a user fatal error, as seen below:

^^^ USER FATAL MESSAGE 9155 (GETLOOP)

^^^ PARAM, LOOPID, 20 DOES NOT CORRESPOND TO A VALID LOOP IDENTIFICATION NUMBER.

The workaround to this is to copy the thermal loads in both initial and restart solution files. Here are some scenarios involving a fixed beam with applied loads.

The initial solution has 2 subcases

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The restart solution has subcase 3 with loads added, and no loads in subcase 1 and 2.

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Scenario 1: Mechanical Load in Restart Analysis

Initial_model.dat: Contains two subcases with both mechanical and thermal loads

Subcase 1: mechanical load(1)
Subcase 2: mechanical load(2) + temperature load(1)

Restart_model.dat:

Add Subcase 3: mechanical load(3)
Important: copy temperature load(1) into the DAT file
Include the necessary restart parameters and run the solution
https://docs.sw.siemens.com/en-US/doc/289054037/PL20231019720938543.bas_nonlinear/id482826

Scenario 2: Additional Thermal Loads in Restart Analysis

Initial_model.dat: Contains two subcases with both mechanical and thermal loads

Subcase 1: mechanical load(1)
Subcase 2: mechanical load(1) + temperature load(1)
Important: copy temperature load(2) into the DAT file

Restart_model.dat: Add SUBCASE 3

Add Subcase 3: temperature load(2) is applied
Include the necessary restart parameters and run the solution

Scenario 3: Combined Thermal and Mechanical Loads in Restart Analysis

Initial_model.dat: Contains two subcases with both mechanical and thermal loads

Subcase 1: mechanical load(1)
Subcase 2: mechanical load(1) + temperature load(1)
Important: copy temperature load(2) into the DAT file

Restart_model.dat:

Add Subcase 3: mechanical load(2) + temperature load(2) is applied
Include the necessary restart parameters and run the solution