caliber pex warnings: port name on the net not valid for netlisting; net id used instead

calibre pex warnings: port name on net not valid for netlisting; net id used instead

During LVS and PEX of UART layout to cdl netlist of UART in virtuoso some warning are coming.
There are no error in DRC , LVS and PEX.
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warnings :
TEXT PRINT MAXIMUM limit of 1000 exceeded. 189 object(s) not printed.
TEXT PRINT MAXIMUM limit of 1000 exceeded. 189 object(s) not printed.
Top level port name "RX/n_73" at location (413,711.76) on net 1 not valid for netlisting; net id used instead.
Top level port name "RX/n_10" at location (407.96,722.96) on net 6 not valid for netlisting; net id used instead.
Top level port name "RX/n_71" at location (409.64,707.28) on net 8 not valid for netlisting; net id used instead.




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why are these warning coming .
they may be dangerous or not.
if they can not be ignored how to remove these warnings.

Re: calibre pex warnings: port name on net not valid for netlisting; net id used ins

You may ignore these warnings, I think - if you don't need to find your port names in the netlist.

AFAIR the netlister doesn't accept port names containing a slash (/). If you want to retrieve your port names in the netlist, prior to netlisting replace the slashes in your port names by (e.g.) underscores (_) :