Unable to create a new subscription: The process cannot access the file because it is being used by another process

Symptoms

• When trying to create or activate a subscription, the following error appears:

  PLESK_ERROR: Error: The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020) In Microsoft.Web.Administration module Exception type: System.IO.FileLoadException at Microsoft.Web.Administration.Interop.IAppHostMethodInstance.Execute() at Microsoft.Web.Administration.Site.Start() at IISWebSite.startStop(IISWebSite* , Boolean start) at IISWebSite.start(IISWebSite* ) at configHosting(test.tst)(WebServerAdapter::configHosting line 408) at configHosting(test.tst)(WebServerManager::configHosting line 3011) at execute console command --install-vhost(vconsoleapp::start line 100) at execute "C:\Program Files (x86)\Parallels\Plesk\admin\bin64\websrvmng.exe" --install-vhost "--vhost-config=tmpECEB.tmp"(vconsoleapp::run line 116) (Error code 1)

• The following error can be found in %plesk_dir%\admin\logs\php_error.log :

  CONFIG_TEXT: ERR [panel] Could not open socket

• Another service is listening to TCP port 80 or 443:

  C:\> C:> netstat -aon | find ":80"
  TCP   0.0.0.0:80       0.0.0.0:0      LISTENING      16281
  TCP   0.0.0.0:8090     0.0.0.0:0      LISTENING      16281

  OR

  C:\> C:> netstat -aon | find ":443"
  TCP   0.0.0.0:443      0.0.0.0:0      LISTENING      16281
  TCP   [::]:443         [::]:0         LISTENING      16281

Cause

Another service is listening to TCP port 80 or 443.

Resolution

1. Connect to the server via RDP.

2. Use Windows Task Manager to determine the service by its PID (PID 16281 in the example above).

3. Stop the service using Windows Task Manager.