...
?-pre | -post? -step_index <step_index> | -step_value <step_value>? ?-set_name <set_name>? ?-deformed?:
-pre | -post: To specify to use the preproces or postprocess mesh (default -pre).
...
-set_name <set_name>: for Elements of post is optional specify -set_name <set_name> to get only the elements of this set, in case that more than one.
-deformed: for nodes of post is optional specify -deformed, in this case the node coordinates are not the original, but the current deformed (mesh deformed adding a vector result multiplied by a scale factor). By default without this flag the original coordinates are returned
- NumElements <Elemtype> ?<nnode>?: returns the number of elements of the mesh.
...