KB210762: “Unable to resolve prompts on content 'null'. Either one of the prompts has no default answer and is required, or there was an error trying to resolve prompt answers.” error appears when listing VLDB properties in Command Manager 9.4.1 and 10.x.

SYMPTOM:
When running the Command Manager script to list VLDB properties for a report the following error may occur:

Unable to resolve prompts on content 'null'. Either one of the prompts has no default answer and is required, or there was an error trying to resolve prompt answers.

• Create a required Attribute Elements List prompt on “Year” attribute without a default answer set:
  

• Create a simple report with “Year” attribute on the template and the prompt from step 1 in the filter.
   
• Run Command Manager script to list VLDB properties:
  

  
  LIST VLDBSETTINGS FOR REPORT 'XXX' IN FOLDER 'XXX' IN PROJECT ‘XXX';

  
  
  

CAUSE:
This is a known issue in Strategy Command Manager 9.4.1 and 10.x.
 
ACTION:
This issue is resolved in Strategy 10.11 and above.  It is also resolved in Strategy 10.4 Hotfix 7 and above.  Upgrade to these versions to take advantage of the fix.
 
WORKAROUND:
There are three known workarounds for this issue.
 

1. Set (a) default prompt answer(s) for the required prompt(s) in the report.
2. Make the required prompt(s) on the report optional.
3. Use project documentation to list the VLDB properties for this report.

KB210762