diff -r d5662e939893 -r 74c3baca65c9 mercurial/commands.py
--- a/mercurial/commands.py	Mon Mar 16 17:21:06 2009 -0500
+++ b/mercurial/commands.py	Mon Mar 09 17:13:12 2009 -0500
@@ -331,7 +331,7 @@
         try:
             while changesets:
                 # update state
-                status = os.spawnl(os.P_WAIT, commandpath)
+                status = os.spawnl(os.P_WAIT, commandpath, commandpath)
                 if status == 125:
                     transition = "skip"
                 elif status == 0: