[Gmsh] GMSH to OpenFOAM file conversion error (GmshToFoam)

Nikhil Bollimuntha · October 27, 2018, 15:10

Hi,
https://drive.google.com/open?id=1I1...hBKktvUO2F89g8

I have imported a step file into Gmsh and meshed it and also defined the boundary surfaces as shown above. I saved the file as a .msh file and tried to use the gmshToFoam to convert this msh file to OpenFOAM format. The following error occurs:

https://drive.google.com/open?id=1mS...ma1etcZJlYIKrw

Really grateful for the help.

Regards.

openfoamtutorials · November 25, 2018, 00:12

I cannot see your error in the linked images (probably best to post it as text), but I think I know what the problem is, as I have solved it myself.

If you are using the newer version of Gmsh (e.g. 4.0+), the default export format for .msh files has changed. However, OpenFOAM's gmshToFoam expects the "legacy" "Version 2" format. You can export your meshes in the legacy format by adding the "-format msh2" flag (if you are exporting by command line), or by selecting Version 2 format when you attempt to export in the GUI via File > Export > ...

Hope this helps!

Nikhil Bollimuntha · November 25, 2018, 12:35

Hi, I did save it as ascii-2 format but that isn't the problem, there seems to be something else. I updated the drive links so you can see the error (unable to post the text for some reason, please see if you can fix it).

Regards,
Nikhil

openfoamtutorials · November 26, 2018, 01:19

If I remember correctly, that is the exact error you get for using V4 format, when gmshToFoam expects V2. How are you exporting V2 format?

Akshay_11235 · May 18, 2019, 09:29

Hello,

I had a similar issue and exporting using "export" Version 1 solved the problem for me.

October 27, 2018, 15:10	GMSH to OpenFOAM file conversion error (GmshToFoam)	#1
Nikhil Bollimuntha New Member Nikhil Bollimuntha Join Date: Oct 2018 Posts: 11 Rep Power: 8	Hi, https://drive.google.com/open?id=1I1...hBKktvUO2F89g8 I have imported a step file into Gmsh and meshed it and also defined the boundary surfaces as shown above. I saved the file as a .msh file and tried to use the gmshToFoam to convert this msh file to OpenFOAM format. The following error occurs: https://drive.google.com/open?id=1mS...ma1etcZJlYIKrw Really grateful for the help. Regards. Last edited by Nikhil Bollimuntha; November 25, 2018 at 12:33.

May 18, 2019, 09:29	Solution	#5
Akshay_11235 Member Akshay Patil Join Date: Nov 2015 Location: Pune, India Posts: 35 Rep Power: 11	Hello, I had a similar issue and exporting using "export" Version 1 solved the problem for me.

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November 25, 2018, 00:12		#2
openfoamtutorials New Member Robert Join Date: Nov 2018 Posts: 8 Rep Power: 8	I cannot see your error in the linked images (probably best to post it as text), but I think I know what the problem is, as I have solved it myself. If you are using the newer version of Gmsh (e.g. 4.0+), the default export format for .msh files has changed. However, OpenFOAM's gmshToFoam expects the "legacy" "Version 2" format. You can export your meshes in the legacy format by adding the "-format msh2" flag (if you are exporting by command line), or by selecting Version 2 format when you attempt to export in the GUI via File > Export > ... Hope this helps!

November 25, 2018, 12:35		#3
Nikhil Bollimuntha New Member Nikhil Bollimuntha Join Date: Oct 2018 Posts: 11 Rep Power: 8	Hi, I did save it as ascii-2 format but that isn't the problem, there seems to be something else. I updated the drive links so you can see the error (unable to post the text for some reason, please see if you can fix it). Regards, Nikhil

November 26, 2018, 01:19		#4
openfoamtutorials New Member Robert Join Date: Nov 2018 Posts: 8 Rep Power: 8	If I remember correctly, that is the exact error you get for using V4 format, when gmshToFoam expects V2. How are you exporting V2 format?