Error: An error occurred while shelling out to mbuild (error code = 255). Unable to build executable.

Hi i am trying to added c files to my poroject but after i did it and tried to build it i got error run mbuild file for compiler so i preformed next steps 1)opened settings and on advanced tab add path for this file 2) tried to build and it started but at the end got error i did and then when i tried to build the project again i got next error:

Error: An error occurred while shelling out to mbuild (error code = 255). Unable to build executable. Pls Hlp. THX

[Walter Roberson]

Have you used

mbuild -setup

yet?