error message in blocking mesh

Ahmed Khattab · February 11, 2012, 06:31

Hi,

when trying to run one of tutorial cases (angled duct explicit) i got this error

--> FOAM FATAL ERROR:
Cannot open mesh description file
"/home/khattab/ahmed-2.1.0/run/tutorials/incompressible/porousSimpleFoam/angledDuctExplicit1/constant/polyMesh/blockMeshDict"

From function blockMesh
in file blockMeshApp.C at line 148.

FOAM exiting

this file has .m4 extension

thanks

romant · February 13, 2012, 02:26

Quote:

Originally Posted by rebel ahmed

Hi,

when trying to run one of tutorial cases (angled duct explicit) i got this error

--> FOAM FATAL ERROR:
Cannot open mesh description file
"/home/khattab/ahmed-2.1.0/run/tutorials/incompressible/porousSimpleFoam/angledDuctExplicit1/constant/polyMesh/blockMeshDict"

From function blockMesh
in file blockMeshApp.C at line 148.

FOAM exiting

this file has .m4 extension

thanks

What do u mean "the file has .m4 extension"?

akidess · February 13, 2012, 02:50

Check the Allrun file in that directory: You have to pre-process the file before you can use it:

Code:

m4 constant/polyMesh/blockMeshDict.m4 > constant/polyMesh/blockMeshDict
blockMesh

anon_a · February 13, 2012, 03:41

m4 is a preprocessor and it can assist you in defining your geometry with variables and make many calculations automatically. And it's really easy too, if you use blockMesh a lot, I would suggest checking that out.

http://en.wikipedia.org/wiki/M4_%28computer_language%29

Ahmed Khattab · February 15, 2012, 05:53

Quote:

Originally Posted by akidess

Check the Allrun file in that directory: You have to pre-process the file before you can use it:

Code:

m4 constant/polyMesh/blockMeshDict.m4 > constant/polyMesh/blockMeshDict
blockMesh

thank you very much. it worked properly now. very grateful for you.

February 11, 2012, 06:31	error message in blocking mesh	#1
Ahmed Khattab Senior Member ahmed Join Date: Feb 2010 Posts: 182 Blog Entries: 1 Rep Power: 16	Hi, when trying to run one of tutorial cases (angled duct explicit) i got this error --> FOAM FATAL ERROR: Cannot open mesh description file "/home/khattab/ahmed-2.1.0/run/tutorials/incompressible/porousSimpleFoam/angledDuctExplicit1/constant/polyMesh/blockMeshDict" From function blockMesh in file blockMeshApp.C at line 148. FOAM exiting this file has .m4 extension thanks

February 13, 2012, 02:50		#3
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	Check the Allrun file in that directory: You have to pre-process the file before you can use it: Code: m4 constant/polyMesh/blockMeshDict.m4 > constant/polyMesh/blockMeshDict blockMesh __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

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February 13, 2012, 03:41		#4
anon_a Disabled Join Date: Mar 2011 Posts: 174 Rep Power: 15	m4 is a preprocessor and it can assist you in defining your geometry with variables and make many calculations automatically. And it's really easy too, if you use blockMesh a lot, I would suggest checking that out. http://en.wikipedia.org/wiki/M4_%28computer_language%29