SVN error:post-commit Hook failed (exit code 127) with output

Command: Commit
Modified: C: \ Users \ xsdff \ Desktop \ project \ index.html
Sending content: C: \ Users \ xsdff \ Desktop \ project \ index.html
Committing transaction ...:
Completed: At revision: 5
Error: post-commit hook failed (exit code 127) with output:
Error: / svn / project / hooks / post-commit: line 53: mailer.py: command not found
[[email protected] hooks] # vi post-commit
/ usr / bin / svn update --username user01 --password 123 / alidata / www / project --no-auth-cache> /alidata/log/svn/svn.log || exit 1 exit 0 #plus || exit 1> and exit 0 (the problem is solved !!!) 

SVN error:post-commit Hook failed (exit code 127) with output