KB37420: "Illegal argument" error occurs when removing an attribute from grid in a report in MicroStrategy Web 9.0.x

SYMPTOM:
 
In Strategy Web 9.0.x, the following error occurs when removing an attribute from grid in a report:
 

 
Sample Code/Error
Error in report results
Your request could not be processed due to a server error.
Please try again. If the problem persists, contact the server Administrator.
Illegal argument
 
STEPS TO REPRODUCE:
Follow the steps below to reproduce the issue with Strategy Tutorial project:

• Create a report like the following:
   
  Row: Region attribute, Cost, Cost Growth, Revenue and Units Sold metrics.
  Column: Month attribute
  Report object: Day attribute
   
  
• Enable 'Remove extra column' option in "Report Options", as shown below:
   
  

• Run the report, drill down from Month to Day attribute, as shown below:
   
  

• Remove Day attribute from grid , as shown below:
   
  

• Note that the error occurs.

CAUSE:
 
This is a known issue with Strategy Web 9.0.x.
 
ACTION:
 
This issue has been addressed in Strategy Web 9.3.0 Upgrade to this version to take advantage of the fix.
 
WORKAROUND:
 
Follow the steps below to work around the issue in Strategy Web:

• Uncheck ‘Remove extra column' option in 'Report Options'.
• Go to ‘Resize Columns and Rows’ in Strategy Web.
• Set the size of metric column to 0, as shown below: