report timing with Tcl in QuartusII 11.0

Hi:

I'm trying to report timing with Tcl in QuartusII, first I open a project and constraint the clock about 125MHz, after compile the project, I want to see the actual fmax, I use Tcl to report the timing, my Tcl commands is as follow:

 load_report $project_name
   puts 

But when I use the command "get_timing_analysis_summary_results",come an error "Error:ERROR: Can't find panel: Timing Analyzer||Timing Analyzer Summary. Specify an existing report panel name"

I konw in QuartusII 11.0, Classic Timing Analyzer is away, is this a reason?

Thanks!