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Illegal charecter ' ! ' in netname.

Prasanna
Hi All,

We have a schematic in which some of the net names are started using ! symbol.  Ex:  !data_line0  etc.

There is no DRC error in the schematic. But when I tried to create netlist for Orcad PCB editor 16.2( allegro netlist) its giving error saying that " net name is having illegal charecter !"

Ex:  #2 Error [ALG0052] Net "!TRST" has illegal character "!".Please rename the net.

Is there any setting to allow these kinds of symbols instead of changing net name over whole big schematic.?

Is this charecter is not allowed in netlister?

Thanks,

Prasanna hegde
  • C Shiva

     Hello Prasanna,

     As you thought the netlister won't allow any special characters. The only way to correct it is changing net names in whole schematic. 

     Regards,
     Shiva.

  • Chalford

    Do you absolutely NEED to come out in Allegro PST netlist format? You could come out of OrCAD in another format (e.g. the non-PST Allegro netlist), edit the netlist to remove/replace the "!"and then import to Allegro.

    Not a preferred route, but something I have to do all the time when people send me netlists with illegal characters. Might be an option if your schematic is big and you are not exporting constraints data from the schematic...

  • Prasanna

    Chalford,

     Yes, I need to generate Allegro netlist PST fromat. I am using Orcad PCB editor 16.2 which supports Pst netlist. So do you have any tricks to avoid such errors in this format?

     

    Thank,

    Prasanna Hegde

  • xmoix

     Use your imagination to substitute the illegal charachter, and use another in that place.

    Orcad Capture doesn't support in any case the next charachters:

     

    1. There are a few illegal characters which the netlister does not allow. The ' character (single quotation mark) is not allowed in net, pin, or part names. Also, the ! (bang) character is not allowed in net names. Similarly, the @ character should not be used while naming library parts used for the PCB Editor.

    Where there is an illegal character, it is substituted with an _ (underscore) character. You are warned if the name has been changed for any reason. There are a few exceptions: A ! (bang) character in net names is a fatal error. However, the \ (backslash) character in net names is not substituted because it is legal.

    Note:  Both the backslash ( \ ) and underscore ( _ ) characters in net names interfere with cross probing.

     

  • Prasanna

    hi...

     thanks for the information. I did it by manual change over whole schematic. I got netlist out of it.

    Thank u all,

    Prasanna Hegde

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