SOLID291 Elements Option Error

- March 28, 2024 at 3:45 pm
  Kazuki Tojo
  Subscriber
  Hi all. I am running a Steady-State Thermal simulation involving conduction and radiation. I have previously obtained solutions without any problem. Yesterday, I added some Surface-to-Surface radiation. No change to the mesh. Then, I faced this error when I tried to run Solve:
```
The element option SOLID291 was either not ordered with this ANSYS      
 installation or the appropriate product was not selected for this       
 session.                                         
```
  This document says SOLID291 is not included in ANSYS Mechanical Enterprise PrepPost, which is the version I have. How can I work around this? Why did it work previously and not anymore? Can I run the simulation with a different element option (not SOLID291)? Thanks in advance!
- March 29, 2024 at 12:00 am
  
  peteroznewman
  Subscriber
  
  Mechanical Enterprise PrepPost is for building models and looking at results, it does not include a solver. You must select the license for the Solver to run Solve.
  You have misread the document you provided. It shows that the SOLID291 is valid for PrepPost and Solver.
- March 29, 2024 at 12:00 am
  
  peteroznewman
  Subscriber
  
  Mechanical Enterprise PrepPost is for building models and looking at results, it does not include a solver. You must select the license for the Solver to run Solve.
  You have misread the document you provided. It shows that the SOLID291 is valid for PrepPost and Solver.
  - March 29, 2024 at 3:30 am
    
    Kazuki Tojo
    Subscriber
    
    Thank you for your help. How should I selected the license for the Solver? Sorry I'm quite new to ANSYS.
    How I've usually done it is I click on my Steady-State Thermal setup within Workbench and it takes me automatically to Mechanical Enterprise PrepPost. How do I go to Solver instead?
    Also, if SOLID291 is included in PrepPost, would you happen to know why I got that error in the first place?
    Sorry for the many question, I appreciate your help!
- March 29, 2024 at 10:20 am
  
  peteroznewman
  Subscriber
  
  On the Home tab, in the Solve section, click on the button in the lower right corner under Resource Predition, a dialog box will open.
  Add a Queue, which I called Solver, click on the pull down for License and select the Enterprise Solver.
  - March 29, 2024 at 7:08 pm
    
    Kazuki Tojo
    Subscriber
    
    This worked perfectly, thank you so much. Really appreciate it!