Problem with CMDB OUTPUT ERROR 120076

Hi,
i´m new in this forum. I am having a problem when i execute a transformation with step CMDBOutput, since system return me the error 120076 "No value supplied for a required attribute.; DatasetId". The flow reads data from a .xls file and then, add constants and then send to CMDB through CMDBOutput.

I have defined DatasetId in the next way trying to get the solution, but anything has worked:

- Including the value in one column in the .xls file and mapping it in the CMDBOutput
- Including the value in constants and mapping the constant value with CMDBOutput
- Not including the value in any file (due to if spoon set it automatically through the CMDBOutput definition)

Any idea about what can i do? i´m blocked

Thanks.
Regards