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HTTP 500.21 Internal Server error when accessing ArchiveOne webservices

  • Type: Knowledgebase
  • Date changed: 10 months ago
Solution #00007660

Scope: ArchiveOne Enterprise, v7.0 or later



When browsing to any of the ArchiveOne web services, e.g. Archive Search website (AOneSearch), you receive the error:

HTTP Error 500.21 - Internal Server Error

Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module list.


You may see this error if .NET is incorrectly installed or registered.


To repair ASP.NET v4  on the affected server:

1.       Run the Microsoft .NET Framework repair tool.

2.       If the error persists, open a command prompt and run (for 64-bit OS): %windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe ?i

Now reopen the AOneSearch website in a web browser to ensure the error is resolved.


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