Sometimes user may have the wrong kind of elements in element set when
assembling 3d continuum problem. This could happen for example in
situations, where mesher is giving also segment elements. They may have
some use in certain situations, but currently we don't support them.
When assembly is failing for this reasons, we give a meaningful error
message:
[ Info: It looks that you are trying to assemble elements of type Seg3
to 3d continuum problem. However, they are not supported yet. To filter
out elements from a element set, try `filter(element->!isa(element,
Element{Seg3}), elements)`
ERROR: LoadError: Tried to assemble unsupported elements of type Seg3 to
3d continuum problem.
This commit closes issue #211.
Jukka Aho
9dc794101c