CFX Pre GUI cant be started, PreGui_ogl.exe error

Darius12345 · March 24, 2021, 10:42

Hello All,

I recently have a problem with CFX in Workbench. Whenever I want to open CFX Pre from Workbench I get the four error messages shown in the attached pictures.
Only the GUI does not work but I can update a project that is already defined and solve it.

I have already tried reinstalling Ansys, also with a complete Ansys folder removal but this didn't help. Originally I was using the 2020R2 version but when I tried with 2020R1, CFX Pre could be started once but the second time the same errors occurred.

Does anyone know how to solve this issue?

Thanks in advance!

ghorrocks · March 24, 2021, 18:14

The error is quite clear, some essential dlls cannot be found.

Either, they are there but the path is wrong and it cannot find (then fix the path!)

or: they are not there so you need to re-install. Make sure you install with administrator access, and in administrator mode.

Also: Maybe your downloaded software is corrupt. Check the md5sum of your download against the ANSYS website values. You might need to download again until the md5sum is correct.

Darius12345 · March 25, 2021, 07:49

Thanks for your suggestions. I found all four .dll files in the Ansys Installation folders .../v202/CFX/lib/winnt-amd64 is this the location where they should be or how can I fix the path?

Unfortunately, I couldn't find any data about the md5sum of the download packages on the Ansys website, can you explain where I can find these?

ghorrocks · March 25, 2021, 18:05

How do I fix the path? Google is your friend.

Where are the md5sums? On the download page on the ANSYS Customer site.

TurboCFX · January 21, 2022, 12:27

Hi Darius, how did you finally solve this? I just recently installed Ansys 2022 R1, and got the same error message when trying to access CFX-Pre from the Workbench.

March 24, 2021, 18:14		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	The error is quite clear, some essential dlls cannot be found. Either, they are there but the path is wrong and it cannot find (then fix the path!) or: they are not there so you need to re-install. Make sure you install with administrator access, and in administrator mode. Also: Maybe your downloaded software is corrupt. Check the md5sum of your download against the ANSYS website values. You might need to download again until the md5sum is correct. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

March 25, 2021, 18:05		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	How do I fix the path? Google is your friend. Where are the md5sums? On the download page on the ANSYS Customer site. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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March 25, 2021, 07:49		#3
Darius12345 New Member Darius Join Date: Dec 2020 Posts: 8 Rep Power: 6	Thanks for your suggestions. I found all four .dll files in the Ansys Installation folders .../v202/CFX/lib/winnt-amd64 is this the location where they should be or how can I fix the path? Unfortunately, I couldn't find any data about the md5sum of the download packages on the Ansys website, can you explain where I can find these?

January 21, 2022, 12:27		#5
TurboCFX New Member Johan Join Date: Jan 2022 Location: Sweden Posts: 1 Rep Power: 0	Hi Darius, how did you finally solve this? I just recently installed Ansys 2022 R1, and got the same error message when trying to access CFX-Pre from the Workbench.