whenever I am trying to compile the UDF file (e.g.in Delta wing tutorial), the error message " no such file or directory opened" always appear. I try my best to remove old (or current) directories that contain libudf or source file and creat new one with different name but the same message keep appear again.

thanks in advance

maybe the path of compiler is wrong. check the environment variables.

Before trying to use the UDF library you need to load it.

Hope this helps. David