Is the view EMPLOYEE that your program references a DDM that you created or is it meant to reference the SAG demo file?
My CE demo view object name is “EMPLOYEES”, and the ID field name is PERSONNEL-ID, not EMPLOYEE-ID. Try changing your program to use those names, or copy to a new program and change them there.
However, since a program with your names won’t Check or Stow, gets Nat0002 Unknown file name, I have to assume you created your own DDM named EMPLOYEE with field EMPLOYEE-ID. That might allow you to Stow or Run the program to get the NAT3041. If so, did you also create the matching Adabas file? That’s a little harder, I think requiring Adabas utilities to create the files, allocate space for it, and create an FDT. I’ve never done it on Windows, but maybe Ralph can give you guidance there.
However, for just tutorial use to learn Natural, the best idea is to just use the EMPLOYEES and VEHICLES sample files that SAG provides. Note that these sample DDMs are under the FNAT/SYSEXDDM directory if you haven’t copied them into FUSER yet. File names Src/EMPLOYEE.NSD and Gp/EMPLOYEE.NGD.
Hope that helps. Good luck.