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ERROR Java exception occurred:
Posted Feb 16, 2010, 12:15 p.m. EST 5 Replies
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I have been getting the below error when I tried to extend the geometry step by step. Nothing seems wrong with the geometry. I've changed the mesh size, this helped a bit but then gave the same error again.
If anyone can help me with this I would really appreciate it. Thanks in advance..
Java exception occurred:
Exception:
com.femlab.jni.FlNativeException: Internal error advancing front mesher
Messages:
Internal error advancing front mesher
Failed to generate mesh for subdomain
- Subdomain: 1
Stack trace:
at afmesh.cpp, row 424, (No candidate point found near (0.000286791, 0.000734401))
at mesh2init.cpp, row 1116, ()
at com.femlab.mesh.Mesh.init(Native Method)
at com.femlab.mesh.Mesh.init(Unknown Source)
at com.femlab.mesh.MeshInitRunnable.run(Unknown Source)
at com.femlab.server.FlRunner.run(Unknown Source)
at com.femlab.server.q.run(Unknown Source)
at com.femlab.util.i.run(Unknown Source)
at com.femlab.util.aa.run(Unknown Source)
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I suggest you try "interactive meshing". Doing something as simple as meshing the subdomains one at a time as opposed to all at once may solve your problem. If this doesn't work take a closer look at the geometry of the subdomain that is giving you trouble. Perhaps there is a very small scale geometry feature (gap etc) that the mesher doesn't know how to handle.
Hope this helps
Ozgur
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Try to localize this point (0.000286791, 0.000734401) in your geometry and take a look on it.
Interactive mesh (as it was said in the previous message) could be also a smart way to mesh domain by domain until you get the error and then detect the wrong point.
Good luck
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I have checked the geometry at the point given in the error message, but there is nothing wrong with the geometry, no intersecting parts or very small areas that mesh cannot cope with, of course I cannot see the mesh because of this error.
Thanks very much for the answers. Interactive meshing will definitely help me.
Regards,
Elif
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I have found a solution for "Internal error in advancing front mesher" error from another comsol forum that I would like to share here to help other users who may come across this problem.
"The advancing front mesher is a new feature of comsol 3.5a, and it is used as the default
meshing method for subdomains. It is possible to try another method, for example "free
triangle", which was the default in 3.4. You would do this by passing the parameter-values
'Methodsub','tri' to the meshinit function: "
fem.mesh = meshinit(fem,'Methodsub','tri')
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My experience is that the advance front mesher often is better and more regular than free mesher, but I too often run into mesh issues obliging me to fight manually (usully I manage by cutting up the domain that causes the problems).
In the GUI you can select the mesher type in the "Free Mesh Parameter" "Subdomain" "Method" field
Good luck
Ivar