NGDBUILD warnings...please help

[kumar]

hello guys,
I am working on a verilog design. But the top level module is written
in handel-C.
First i synthesised the verilog design with the synthesis option 'Add
I/O buffers' unchecked. it generated .ngc file. the synthesis report
showed that the design used some 280 slices of the device considered.

Next while running NGDBUILD for the top level module, i used the ngc
file generated, as it has to merge the two source files and create a
single file.
But while i am doing this i am getting several warnings as:

WARNING:NgdBuild:454 - logical net 'W168_send_protocol_56_main' has no
load
WARNING:NgdBuild:454 - logical net 'W169_send_protocol_56_main' has no
load
WARNING:NgdBuild:454 - logical net 'W170_send_protocol_56_main' has no
load
WARNING:NgdBuild:454 - logical net 'W171_send_protocol_56_main' has no
load
WARNING:NgdBuild:454 - logical net 'W172_send_protocol_56_main' has no
load
....

send_protocol is the top level design name.

And the synthesis report shows that the design uses only 324 slices. i
dont understand what the problem is.
could anyone please help me.

thanks,
kumar