Error when reading abaqus with more than one NODE block

[albertoferna]

I think this is quite related to https://github.com/nschloe/meshio/issues/268 but in case it is not. In some cases, an abaqus file may have nodes in different blocks. For example, in the attached file a node is separated from the rest due to a different reference frame (cylindrical system). This was done due to a mus easier setting of boundary conditions in this case. When this file is imported it fails the cell check. If I'm reading the code correctly this is to be expected as the second NODE block with just one node overwrote the first.

test_mesh_abaqus.inp.zip

[nschloe]

Ping @hillyuan.