Error while trying to do Debug Timing

Hi

 I am new to Cadence Encounter tools

So to learn, i tried to implement a design given in a tutorial from Wright State University (http://www.cs.wright.edu/~emmert/tutorials/Cadence_First_Encounter.pdf)

After i finished Placement and Routing and Filling, i tried to find its delay through Debug Timing from Timing tab 

But it shows the following error

**ERROR: (ENCQTF-4005):    Cannot find item 'pan1f0page_b1' in form 'tdDock@frameOnly'.
**ERROR: (ENCQTF-4005): Cannot find item 'pan1f0page_b1' in form 'tdDock@frameOnly'.
**ERROR: Path 1 not found.
report_timing -machine_readable -max_points 10000 -max_slack 750.0 -path_exceptions all > top.mtarpt
Parsing file top.mtarpt...
**WARN: (ENCGTD-801):   File (top.mtarpt) does not contain any timing paths.
This could be because the report is not of the correct format,
or because it does not contain any paths (because there are no
failing paths in the design, for instance).
**ERROR: (ENCQTF-4005): Cannot find item 'pan1f0page_b1' in form 'tdDock@frameOnly'.
**ERROR: (ENCQTF-4005): Cannot find item 'pan1f0page_b1' in form 'tdDock@frameOnly'.
**ERROR: (ENCQTF-4005): Cannot find item 'pan1f0page_b1' in form 'tdDock@frameOnly'.
**ERROR: (ENCGTD-908):  Path (1) not found.
**ERROR: (ENCQTF-4044): Tcl Error in Command '::Rda_Timing::TimingDebug:Start': .

 And in GUI it shows Path 1 not found

What may be the source of error??

I am using Encounter version 9.1

In the tutorial they havent performed any timing analysis

can anyone kindly give me any link of another tutorial in which timing analysis has been performed

Please help me,

regards

deepak