GDL_PATH in windows

[tlamontsmith]

I've tried setting GDL_PATH in the environment variable either as a user variable or a system variable and still get the same message and behaviour.

GDL - GNU Data Language, Version v1.0.2-576-g7602867d-dirty

• For basic information type HELP,/INFO
• Default library routine search path used (GDL_PATH/IDL_PATH env. var. not set): C:\Program Files\gnudatalanguage\share\gnudatalanguage\lib; c:\tlsmith\software\idl\lib;
  etc

Much of the GDL functionality seems to work for simple programs. However when I try to do something like plotting map data by using map_set or any programs that are not in GDL_HOME then they can't be found in the search path, although print,!path shows the correct path.

What do I need to get to get GDL_PATH environment variable set correctly? Should it be a user variable or a system variable, and what should be in the path in order for all the functionality to be there? How can I test what directories and sub-directories are actually being searched if it isn't !path ?