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Error using ToBoundaryMesh and then ToElementMesh (NDSolve package)

Shuai Liu

Shuai Liu, texas A&M UNIVERSITY

Posted 10 years ago

When I use ToBoundaryMesh and then ToElementMesh (both are in NDSolveFEM packege) to generate a FEM mesh, this error message always comes out bem = ToBoundaryMesh[ "Coordinates" -> {{0, 0}, {0.5, 0}, {1, 0}, {1, 1}, {0, 1}}, "BoundaryElements" -> {LineElement[{{1, 2}, {2, 3}, {3, 4}, {4, 5}, {5, 1}}, {1, 2, 2, 2, 2}]}]; mesh = ToElementMesh[bem]; LibraryFunction::verserr: An error due to an incompatible function call was encountered evaluating the function getSegmentMarkers. The library was compiled with a previous WolframLibrary version. Recompile with the current version to fix the error. >> The problem might be with the segment marker command. After I delete the marker and run again, everything is good. bem = ToBoundaryMesh[ "Coordinates" -> {{0, 0}, {0.5, 0}, {1, 0}, {1, 1}, {0, 1}}, "BoundaryElements" -> {LineElement[{{1, 2}, {2, 3}, {3, 4}, {4, 5}, {5, 1}}]}]; mesh = ToElementMesh[bem]; There seems some problem with the corresponding function in the package. How can I fix it? Or as the error message says, how can I recompile with the current version?

When I use ToBoundaryMesh and then ToElementMesh (both are in NDSolveFEM packege) to generate a FEM mesh, this error message always comes out

bem = ToBoundaryMesh[
   "Coordinates" -> {{0, 0}, {0.5, 0}, {1, 0}, {1, 1}, {0, 1}},  "BoundaryElements" -> {LineElement[{{1, 2}, {2, 3}, {3, 4}, {4, 5}, {5, 1}}, {1, 2, 2, 2, 2}]}];

mesh = ToElementMesh[bem];

    LibraryFunction::verserr: An error due to an incompatible function call was encountered evaluating the function getSegmentMarkers. The library was compiled with a previous WolframLibrary version. Recompile with the current version to fix the error. >>

The problem might be with the segment marker command. After I delete the marker and run again, everything is good.

 bem = ToBoundaryMesh[
       "Coordinates" -> {{0, 0}, {0.5, 0}, {1, 0}, {1, 1}, {0, 1}}, 
       "BoundaryElements" -> {LineElement[{{1, 2}, {2, 3}, {3, 4}, {4, 
            5}, {5, 1}}]}];

mesh = ToElementMesh[bem];

There seems some problem with the corresponding function in the package. How can I fix it? Or as the error message says, how can I recompile with the current version?

POSTED BY: Shuai Liu

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Udo Krause

Udo Krause, NOrganization

Posted 9 years ago

You cannot fix it (recompilation) without being the owner or maintainer of the source code. In Mathematica 10.4.1.0 (Win 10 Prof 64 Bit) it works In[1]:= << NDSolve`FEM` bem = ToBoundaryMesh["Coordinates" -> {{0, 0}, {0.5, 0}, {1, 0}, {1, 1}, {0, 1}}, "BoundaryElements" -> {LineElement[{{1, 2}, {2, 3}, {3, 4}, {4, 5}, {5, 1}}, {1, 2, 2, 2, 2}]}] Out[2]= ElementMesh[{{0., 1.}, {0., 1.}}, Automatic] In[3]:= mesh = ToElementMesh[bem] Out[3]= ElementMesh[{{0., 1.}, {0., 1.}}, {TriangleElement[ "<" 643 ">"]}]

You cannot fix it (recompilation) without being the owner or maintainer of the source code. In Mathematica 10.4.1.0 (Win 10 Prof 64 Bit) it works

In[1]:= << NDSolve`FEM`
bem = ToBoundaryMesh["Coordinates" -> {{0, 0}, {0.5, 0}, {1, 0}, {1, 1}, {0, 1}}, 
  "BoundaryElements" -> {LineElement[{{1, 2}, {2, 3}, {3, 4}, {4, 5}, {5, 1}}, {1, 2, 2, 2, 2}]}]

Out[2]= ElementMesh[{{0., 1.}, {0., 1.}}, Automatic]

In[3]:= mesh = ToElementMesh[bem]
Out[3]= ElementMesh[{{0., 1.}, {0., 1.}}, {TriangleElement[ "<" 643 ">"]}]

enter image description here

POSTED BY: Udo Krause

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