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Hi all,

In a previous post I asked about topological issues, and that was solved. So I began working on an exporter from a mesher I developed tomphtxt.

However, I am finding problems in moving from a simple tetrahedron, to a prism, but I don't find any log (even in the debug log window). The only output I see is

A problem occurred when building mesh feature 'Import 1'. Error reading file. - Line number: 42

The weird part is that line 42 is a comment line. Moreover, it is a simple copy/paste from the tetrahedron that COMSOL imports without problems.

How can I debug this issue? I am attaching the two files and pasting down here.

Thanks for any pointers! Franco

Here's the tetrahedron that works:

# Major & minor version (For the current version, supported by COMSOL Multiphysics version 5.5, the first two entries in a file are 0 1) 0 1 # Number of tags (The tags are strings that function as identifiers so that objects can refer to each other) 1 # Tags (The number preceding the tag name is the number of characters in the string) 6 mesh23 # Number of types (In the current version, 0 1, of the COMSOL native data format, types are not used and are ignored.) 1 # Types 7 ignored # ----------------------------- # --------- Object 0 ---------- # ----------------------------- # Mandatory header 0 0 1 # Object type (String that defines which type of object follows) 4 Mesh # Version of internal COMSOL class 4 # Space dimension 3 # Number of mesh vertices 4 # Lowest mesh vertex index 0 # Mesh vertex coordinates (x, y, z) 0 0 0 1 0 0 0 1 0 0 0 1 # Number of element types (0-based indexing) 1 # Element type #0 # Type name (The number preceding the tag name is the number of characters in the string) 3 tet # Number of vertices per element 4 # Number of elements 1 # Elements 0 1 2 3 # Number of geometric entity indices (domains?) 1 # Geometric entity indices 1

Theprismdoes not work:

# Major & minor version (For the current version, supported by COMSOL Multiphysics version 5.5, the first two entries in a file are 0 1) 0 1 # Number of tags (The tags are strings that function as identifiers so that objects can refer to each other) 1 # Tags (The number preceding the tag name is the number of characters in the string) 6 mesh23 # Number of types (In the current version, 0 1, of the COMSOL native data format, types are not used and are ignored.) 1 # Types 7 ignored # ----------------------------- # --------- Object 0 ---------- # ----------------------------- # Mandatory header 0 0 1 # Object type (String that defines which type of object follows) 4 Mesh # Version of internal COMSOL class 4 # Space dimension 3 # Number of mesh vertices 12 # Lowest mesh vertex index 0 # Mesh vertex coordinates (x, y, z) 0 0 0 1 0 0 0 1 0 0 0 1 1 0 1 0 1 1 # Number of element types (0-based indexing) 1 # Element type #0 # Type name (The number preceding the tag name is the number of characters in the string) 3 tet # Number of vertices per element <------- THIS IS LINE 42 4 # Number of elements 3 # Elements 0 1 2 3 2 3 1 4 4 3 5 2 # Number of geometric entity indices (domains?) 1 # Geometric entity indices (each element belongs to domain number?) 1 1 1