Part of code:
a!queryProcessAnalytics(
  report:cons!APP_MY_REPORT,
  contextProcessModels:cons!APP_MY_MODEL,
query:a!query(
    selection:a!querySelection(
      columns:{a!queryColumn(
        field:"c6"
      )}
    ),
    filter:a!queryFilter(
      field:"c7",
      operator:"=",
      value:ri!inputId
    ),
    pagingInfo:topaginginfo(startindex:1, batchsize:-1 )
  )
  )
Report Output:	
[startIndex=0, batchSize=0, sort=, totalCount=0, data=, identifiers=, name=, description=, columnConfigs=, errorMessage=Grouping and aggregation are not supported. (APNX-1-4203-027)]