$ setup_dir:
$ subroutine
$
-$ @[-.util]deltree [.tsa]*.*
-$ set file/prot=(S:RWED,O:RWED,G:RWED,W:RWED) tsa.dir;*
-$ delete tsa.dir;*
+$ if f$search("tsa.dir") .nes ""
+$ then
+$ @[-.util]deltree [.tsa]*.*
+$ set file/prot=(S:RWED,O:RWED,G:RWED,W:RWED) tsa.dir;*
+$ delete tsa.dir;*
+$ endif
$
$ create/dir [.tsa]
$ set default [.tsa]