DM-HDL-0100 The handle is null or not valid

Cognos Data Manager DM-HDL-0100 Error

Error Message:'GetPropertyString' returned with 1 message

1. Error

DM-HDL-0100 The handle is null or not valid.

Cause: When we create any new data source for a build and forgot to provide business name, Data Manager through this error and it trapped in a infinite loop of error message.

Resolution:

Open Task Manager.
In process tab, search for dsdegine.exe and kill the appropriate process.
Now reopen your catalog.
Create the source with appropriate Business Name.

Best Practice: Make a good habit to provide meaning full unique business name.