Symptoms

The following error is raised when the user clicks on a Process Instance using the Process Overview report:

Error: An error occurred loading the report. Click on Details below for more information
Could not initialize ReportFilterControl: Failed to build Criteria Table Scheme: Value cannot be null. Parameter Name: s
 

Diagnoses

We have seen the following error in the HostServer Logs:

331256184","2016-03-15 13:11:11","Info","SmartObjects","10530","ExecuteMethod","SourceCode.SmartObjects.Runtime eGetSmartObject(tSMARTOBJECTNAME])]","10530 Executing Method: '13:11:11 GetSmartObject(tSMARTOBJECTNAME])' ...","anonymous","0.0.0.0","DEVAP5474:C:Program Files (x86)K2 blackpearlHost ServerBin","331256184","51b8c04998e4450193c19a8c2de46544",""
"331256185","2016-03-15 13:11:11","Error","SmartObjects","10032","GetSmartObject","SourceCode.SmartObjects.Runtime eGetSmartObject]","10032 SmartObject Server exception source: Exception nRoot element is missing.]","anonymous","0.0.0.0","DEVAP5474:C:Program Files (x86)K2 blackpearlHost ServerBin","331256185","b4dbafa05adf4a4ab0da4485bbb3b10f",""
"331256186","2016-03-15 13:11:11","Info","SmartObjects","10531","CompleteMethod","SourceCode.SmartObjects.Runtime eGetSmartObject(tSMARTOBJECTNAME])]","10531 Completed Method: '13:11:11 GetSmartObject(tZurichGetWorklistItemsSmartObject])'","anonymous","0.0.0.0","DEVAP5474:C:Program Files (x86)K2 blackpearlHost ServerBin","331256186","06f67264277a45be894ba9609f439b53",""

 

Resolution

The client confirmed that the SmartObject was an obsolete SmartObject and could be deleted.
After deletion the Workspace reports started working