Unable to add Virtual Machines (VM) to a Machine Creation Services (MCS) catalog.

The following message appears in the logs: 

"Xendesktop Management Console:1:1: [43] Script GetCatalogTaskScript(579): System.ArgumentException: An item with the same key has already been added."

Complete the following steps:

1. Check the Actions tab and clear it.

2. If the Action tab is empty, then open the PowerShell console from the PowerShell Tab.

3. Run Get-BrokerCatalog to see if any Metadata information is present for the Catalog that is having issues adding new machines. Check the MetadataMap.

4. Follow these steps:

   1. Get-brokerCatalog

   2. $s = Get-BrokerCatalog

   3. Remove-BrokerCatalogMetadata –InputObject $s –Name “[Metadata information]”
      Note: Copy MetadataMap from Step 3 and paste into [Metadata Information].

5. ​Exit and open a new powershell session and run Get-BrokerCatalog the selected Metadata information should have been removed.

Problem Cause

There is a Catalog whose MetadataMap contains TaskData keys tied to a task holding duplicate nonterminatingErrors for either Accounts or Machines.