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Article ID: 122504, created on Jul 29, 2014, last review on Jul 29, 2014

  • Applies to:
  • Helm 4.2


Admin unable to log into to Helm4.

The following error is present in the error log:

<entry date='635422040844218750' utc_offset='1' assembly='WHA.Helm.Core.dll' source='Login' method='Save'>The exception Root element is missing. occurred while attempting to save the Login.</entry>


Bad xml files in the C:\Program Files\Parallels\Helm41\ScheduledTasks folder.


  1. Check if some .xml files has size 0 byte and remove them.
  2. Restart Helm4 service.
  3. Reset password via HelmConfigurationTool.exe

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