Description of problem:
From a Bug summary page I followed the "Dependency graph" link to:

  https://bugzilla.redhat.com/showdependencygraph.cgi?id=636035

Happiness did not ensue:

  "Software error:

  Error in tempfile() using data/webdot/XXXXXXXXXX.dot: Parent directory (data/webdot/) is not a directory at /var/www/html/bugzilla/showdependencygraph.cgi line 114

  For help, please send mail to the webmaster (bugzilla-owner), giving this error message and the time and date of the error. "


Version-Release number of selected component (if applicable):
4.2

How reproducible:
Always

Steps to Reproduce:
1. Go to a bug page
2. Click the 'Dependancy graph' page link
3.
  
Actual results:
Error 500 response

Expected results:


Additional info: