sopc design with ddr sdram controller

Hi,

I am getting the following error when running the sopc design(which has ddr-sdram controller), am I suppose to change anything in the TCL scripts to amke it work?

Error: Analysis and Elaboration failed. The constraints script will not be able to add any constraints.

Error: Tcl error: ERROR: Error(s) found while running an executable. See report file(s) for error message(s). Message log indicates which executable was run last.

while executing

"error $result"

(procedure "check_paths" line 13)

invoked from within

"check_paths $wrapper_name $do_analysis"

invoked from within

"if { $run_var != 0 } {# ########################################################################### Procedure check_paths() will analyse the project..."

(file "add_constraints_for_ddr_sdram_0.tcl" line 74)

invoked from within

"source add_constraints_for_ddr_sdram_0.tcl"

(file "auto_add_ddr_constraints.tcl" line 11)

Error: Evaluation of Tcl script auto_add_ddr_constraints.tcl unsuccessful

Error: Quartus II Shell was unsuccessful. 11 errors, 0 warnings

Error: Peak virtual memory: 60 megabytes

Error: Processing ended: Thu Oct 16 14:09:52 2008

Error: Elapsed time: 00:00:15

Error: Total CPU time (on all processors): 00:00:00

Error: Quartus II Full Compilation was unsuccessful. 13 errors, 0 warnings

Thanks a lot!

Sasi