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EAGLE User Chat (English) Running DRC Creates 'Ghost' traces.
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Running DRC Creates 'Ghost' traces.

Former Member
Former Member over 10 years ago

Every time I run DRC I get stray Traces and hundreds of errors.  The ghost traces are on  different layers and cause  Width, clearance,distance, etc errors.  Images of Before and after  running DRC shown below.   Currently using Eagle 7.1 -- Have had problem in previous versions of 6 but seems to be getting worse. I'm running Win8 Pro.  Don't know if it is an OS problem or not.   Images persist on reloading but disappear when I delete the '.pro' file.   Ghost traces don't appear to get imbedded into Gerber files but do create problems running down trace errors. How to I prevent this behavior.

 

 

Before Running DRC

image

 

After Running DRC

image

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  • autodeskguest
    0 autodeskguest over 10 years ago

    On 29/10/14 19:11, G.T. Grey wrote:

    Every time I run DRC I get stray Traces and hundreds of errors.  The

    ghost traces are on  different layers and cause  Width,

    clearance,distance, etc errors.

     

    I suspect you're misinterpreting what you're seeing. Those so-called

    traces look to me like DRC error markers. Try clearing all the DRC

    errors in the dialog box.

     

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  • Former Member
    0 Former Member over 10 years ago in reply to autodeskguest

    You may be right.  I thought each error was simply highlighted with a square box as it was selected in the dialog box.  But it that's the case,  Why doesn't it disappear when a correction is made and the DRC is re-run??  Why do these 'ghost' traces remain on the board layout after the DRC dialog is closed ?? And.. if cleared in the dialog box, they never show up again unless the .pro file is deleted and the board is reloaded.   

     

    I'm relatively new to Eagle and may not understand many of the settings but at this point it appears the DRC can be more of a hindrance than a help.

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  • autodeskguest
    0 autodeskguest over 10 years ago in reply to Former Member

    On 30/10/14 15:26, G.T. Grey wrote:

    You may be right.  I thought each error was simply highlighted with a

    square box as it was selected in the dialog box.

     

    No, that's only to draw your attention to it. The real "indication of

    the problem" is drawn hatched in the appropriate colour for the layer

    it's been found on. This allows the DRC to show exactly how big a

    problem you've got with clearance errors, because it only hatches the

    overlap of the required clearances.

     

    But it that's the

    case,  Why doesn't it disappear when a correction is made and the DRC is

    re-run??

     

    Simply adjusting the position of your tracks doesn't clear the DRC

    error. You have to explicitly tell Eagle that you (think you) have fixed

    it, by clicking the "Processed" button on the DRC dialogue. (Older

    versions of Eagle had a "delete" button instead, which was more obvious

    in what it did).

     

    Why do these 'ghost' traces remain on the board layout after

    the DRC dialog is closed ??

     

    Because the errors are still there, unless you've cleared them.

     

    And.. if cleared in the dialog box, they

    never show up again unless the .pro file is deleted and the board is

    reloaded.   

     

    How are you clearing them? Since Eagle 5 it's been possible to "Approve"

    errors. This was added because sometimes you need to do things that are

    actually fine but always create DRC errors (search for threads on

    connecting two nets together to see an example). What approve does is to

    mark that error as one you know about, are sure is actually fine, and

    have no intention of fixing, so just quit bugging me about it, OK? Don't

    do this if you've actually fixed it.

     

     

    I'm relatively new to Eagle and may not understand many of the settings

    but at this point it appears the DRC can be more of a hindrance than a

    help.

     

    No, it's definitely more of a help, once you've got the hang of it.

     

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