Question about the dof_map_vector

[OliiLee]

Hi,

I'm working with the implementation of the domain decomposition algorithm based on the mfem. In the algorithm, I need to build the dof map from a parellel-fespace to a serial-fespace. I think the idea in the method dof_map_scalar and dof_map_vector is just what I need. Since these two methods can't handle this directly, I rewrite the code in C++. Things go right with H1 element and the 1-order ND element, but when I use 2-order ND element, things go wrong. The result from parallel runing is different to the result from serial running. One possible reason maybe I neglect the handling of the variable "external_entry". I don't know why it should be handled here. I'd appreciate your suggestion and some explanation on the variable "external_entry".

Thank you in advance!