Read the following topic if you are experiencing errors when you are formatting blank data issues for the Picklist fields.
When you are running Scribe solutions for a Microsoft™ Dynamics CRM to Acoustic Campaign Integration, maps that update CRM picklist, optionset fields or boolean fields from Acoustic Campaign produce update failure errors if the value in Acoustic Campaign is blank.
Resolving the problem
ISNULLOREMPTY formula might be to be implemented to fix the issue. After applying the formula, Reprocess the failed records through the Scribe, to see if it was fixed.