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Knowledge Base

Application pools are crashing on Plesk for Windows Server: The Module DLL C:pathtomodule_name.dll failed to load. The data is the error.

 
backupplesk for windowsplesk serverservertechnical questions

Symptoms

  • Plesk and websites are unavailable with the following error message in a web-browser:

    503 Service unavailable.

  • Application pools are stopped in IIS Manager > Application pools.

  • After restarting an application pool of the website and accessing this website, the application pool crashes.

  • The following error message is logged in Windows Event Viewer > Windows Logs > Application:

    The Module DLL C:pathtomodule_name.dll failed to load. The data is the error.

Cause

The module defined in IIS configuration is improperly configured.

Resolution

  1. Connect to the Plesk server via RDP.

  2. Start a Command Prompt as an Administrator.

  3. Create a backup of IIS configuration:

    C:> %windir%system32inetsrvappcmd.exe add backup BeforeEditBackup

    Note: The backup will be created in
    C:WindowsSystem32inetsrvbackup
    .

  4. Start Internet Information Services (IIS) Manager at Windows Start > All Programs > Administrative Tools.

  5. In IIS Manager, click on SERVERNAME > Modules and remove the faulty module reported in the error message.

    Note: In case the module is not visible on the modules page, move to step 6.

  6. Open the file
    %windir%system32inetsrvconfigApplicationHost.config
    in a text editor and remove the lines related to the faulty module (if exist).
    For example:

    <add name="CSPms" image="C:InetpubCSPGatewayCSPms.dll" />

  7. Save the changes.

  8. Restart IIS:

    C:> iisreset

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