KB46217: "Cannot read property mid of null" or "this._docModel is null" error when using ESRI Maps Custom Visualization in a report in MicroStrategy Analytics Enterprise 9.4.1 HF2.

SYMPTOM:
 
Strategy Web 9.4.1 HF2 users will notice that when configuring the ESRI Maps custom visualization in a report an error message will show up. This error may vary across browsers as shown below:
 
Internet Explorer:

Unable to get value of property 'mid': object is null or undefined

 
Chrome:

Cannot read property 'mid' of null

 
 
Firefox:

this._docModel is null

 
STEPS TO REPRODUCE:

• Make sure that custom visualizations have been enabled in the Web Preferences > Project Defaults > General > Custom Visualizations as shown below:
  

• Create a report with an attribute that contains latitude and longitude information in Strategy Web 9.4.1 HF2.
• Add a metric to this report
• Unmerge the row and column headers.
• Under the Tools Menu select "Custom Visualizations"
• Enable custom visualizations for this report and select the ESRI Map Visualization located under the AJAX category as shown below:
  

• Click on "Visualization Properties"
• Select the attribute or attributes with the correct information in the dropboxes.
• Enable "Show Markers" and click "OK". A correct configuration is shown below:
  

• Run the document and notice that the error in the symptom is shown.

CAUSE:
 
This is a known issue with ESRI Maps as custom visualizations in reports.
 
ACTION:
 
This issue is addressed in Strategy Web 9.4.1 Hotfix 3. Please upgrade to this version to take advantage of the fix.
 
WORKAROUND:
 
ESRI Maps will work properly as visualizations in VIsual Insight or as a widget in a Report Services Documents. If possible use these two options instead of a custom visualization in a report.
 
 
 
KB46217