Try to create a sort control in a subreport but nothing happens in the Crystal Reports designer.
The issue has been identified and tracked under ID ADAPT00760493. A subreport can affect/change the main report through a shared variable. If the shared variable is affected by sorting then performing sort on the subreport could affect the main report. When the report is changed, all drill down views and subreport views will be closed because they may no longer exist.
This behavior is by design.
CR2008 CR 2008 XIR3 XI R3 XI3.0 XI3 3 3.0 TITAN RN , 7702470 , KBA , BI-RA-CR , Crystal Reports designer or BusinessViews Manager , Bug Filed
Crystal Reports 2008 V0