Unable to start vncserver service for all users in RHEL6.

Issue

• Vncserver is configured for multiple users as per the instruction given in KB-6605
• When trying to start vnc daemon, it's starting for first three users only.

• Getting following error for remaining users:

  Invalid null command.
  if: Expression Syntax.
  
  else: endif not found.  [FAILED]
  

• Users are able to start vncserver using "vncserver :4" command.