Problem solved. The lines on red were added. Make sure that the changes are being loaded.
1. PROGRAM MAINT
2. var maint_move : path
3. routine maint_exe
4. BEGIN
5. $UTOOL = POS(-104,-9.5,291,0,0,0,'N')
6. MOVE ALONG MAINT_MOVE
7. end maint_exe
8. begin
9. Repeat
10. maint_exe
11. Until false
12. END MAINT