ncverilog file ordering error

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Gurgen

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I have got this for ncverilog tool:

ncelab: *E,CUVMUR (./a.v,387|18): instance 'nwl_rl3_cmd_proc.nwl_rl3_rw_ctrl_ch0' of design unit 'nwl_rl3_rw_ctrl' is unresolved in 'worklib.nwl_rl3_cmd_proc:v'.

Please note that ncverilog requires files ordering for correct compilation. Otherwise you will got error.
Example.
assume we have the following files
a.v
b.v
and b module is instantiated in a.v file.
so you should call ncverilog like this:

ncverilog b.v
ncverilog a.v

otherwise I will got above mentioned ERROR
I don't know what is the flag for ncverilog command to avoid ordering of verilog files ((

Does ncverilog have that flag ?
 

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