Learning Forum

[rainwadj]

I have a researcher who is unable to use Ansys 2022/R2, specifically the Mechanical application.  After entering the 'runwb2' command, he opens his project file, then double-clicks the Model entry under Static Structural.  The first issue is that we see no geometry model in the viewer like we should (circled red). This is confirmed by hitting the 'Zoom-To-Fit' button which will fit the imported geometry in the graphics viewer (crcled yellow). Secondly, a 'Ruler' should be located in the black circled area. Third, a 'Triad' (3D axis showing direction of x, y, and, z) should appear in the green circled area. I ensured that those options are enabled so they should be in the graphics window. Lastly, if you click the '+' next to 'Geometry Imports' (circled purple) to expand the list of geometry imports and click on 'Geometry Import (B3)', the Mechanical application crashes and the terminal reports the fatal error.

This is all on Linux (CentOS 7).

Any ideas?

 

[rainwadj]

We also tested this with 19.2, and it works as it's supposed to.

[Rob]

I suspect it's OS graphics related, which verson of CentOS 7 are you using?  https://www.ansys.com/content/dam/it-solutions/platform-support/ansys-2022r2-platform-support-by-application-product.pdf

[rainwadj]

I'm on version 7.9 of CentOS.

[Rob]

It should work, I'll flag for installation to check. 

[George Karnos]

Hello,
If the graphics card is listed as tested:
https://www.ansys.com/content/dam/it-solutions/platform-support/ansys-2023-r1-graphical-display-graphics-cards-tested.pdf

I would recommend updating the graphics card driver to the latest.

[rainwadj]

I have found that it works correctly if I run it directly on the physical workstation.  The problem only seems to occur when I connect to the workstation with VNC to run it remotely.  This worked correctly in 19.2.

 

[George Karnos]

Which version of VNC are you using?
https://www.ansys.com/content/dam/it-solutions/platform-support/previous-releases/ansys-2022-r2-remote-display-and-virtual-desktop-support.pdf

[rainwadj]

On the workstation, I have tigervnc-server installed.  On the client, a lot of the users are on Windows with RealVNC.  I'm a Mac guy myself, so I've tried with the built-in Screen Sharing app over an ssh tunnel.

I've also tried using RDP, with xrdp installed on the workstation and Microsoft Remote Desktop as the client.  This fails... differently. After loading the project, I double-click the Model line, and it says "Starting Mechnical" at the bottom of that window, but when it opens the second window, it's mostly just a smear.  See attached.

[rainwadj]

Any ideas on this?

[Mangesh Bhide]

Please try prepending the path to Mesa folder to LD_LIBRARY_PATH

example: Is Ansys is installed to /nfs/apps/ansys_inc/v221/Framework/bin/Linux64/Mesa and LD_LIBRARY_PATH is set to say /a/b:/1/2 etc etc
then set

LD_LIBRARY_PATH=/nfs/apps/ansys_inc/v221/Framework/bin/Linux64/Mesa:/a/b:/1/2 etc etc

then try launching Workbench. I would expect Mechanical to show graphics, but this will be using software rendering and slow. if slow, please look into graphics hardware and remote display methods which support hardware graphics acceleration

Note: a and b and 1 and 2 are not real folders and you need not set those, this is just an example to denote your existing path which may contain many such eentries separated by a colon

[rainwadj]

Most of the workstations have AMD Radeon RX 4xx cards in them.  I have updated one of them to the latest driver (version 22.40 released 12/13/2022).  No luck with either VNC (black panel where the graphics should be, but the rest of the interface is normal) or RDP (smeared graphics when the Mechanical window is opened).

I tried adding the Mesa directory to LD_LIBRARY_PATH just before running Ansys, on both a VNC connection and an RDP connection, and the results are the same as above.

 

[rainwadj]

I also tried running the same project on that system with Ubuntu 20.04, and the results are the same for VNC.