CFD-Fastran Import Mesh Error
 

Hello everyone, I'm using CFD-Fastran to solve a supersonic case recently. The version I got is CFD-Fastran 2014 x64, my OS is win10 64bit. The problem is when I imported a mesh file that created by trelis, it always failed. The error information is:
Handled Error on line 172 file..\src\DTF_File.cpp
DTF Library Error Code: 12
DTF Library Error String: Cannot create a file
Successfully closed all DTF files.
I have tryed using another mesh file which can be used by Fluent, but it is also failed. Does anybody know how to solve this problem? Please tell me, thank you all!