Article ID: 9478, created on Dec 22, 2010, last review on May 9, 2014

  • Applies to:
  • Helm 4


Helm is updated to 4.1.2 version (
My Domains > (your domain) > Advanced Website Options > Website Settings page shows the error:

Object reference not set to an instance of an object.

WHA.Helm.Providers.Interface /Providers/EF9200DF-2A17-4956-94D5-3B9911E19217/ OnLoad
Stack Trace:

at WHA.Helm.ProviderInterfaces.IIS7.WebsiteSettings.OnLoad(EventArgs e)


Helm 4.1.2 introduced a new feature of pre-propagation for IIS7, which added a new setting for IIS7 web service - Pre-propagation Domain Name. To work properly, the setting should be explicitly saved after Helm is updated.


  1. Go to CP / Home / Helm System / Server / your Server / Services / your IIS7 service
  2. Click Save.

Additional information

The issue will be addressed in one of the upcoming product updates.

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