Hello,
When I try to create a report with a grouped field from a table in ArcMAP, I receive the following error:
"System.Runtime.InteropServices.COMException: Error HRESULT E_FAIL has been returned from a call to a COM component."
The table was generated in MS Excel and added to the data frame. When I open (i.e. link to) the original table in MS Access, I can create the desired report there without any problems. I can also create a report without any grouping in ArcMAP. I am using ArcGIS for Desktop (ArcMAP 10.3.1.4959) and have Microsoft.NET framework 4.6.1 installed.