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10 Layer PCB project won't generate Gerber's completely for middle layers

Hello Fellow PCB Designers,

We have a 10 layer PCB design that originated in Pads and was converted over to Allegro 17.4, this is an old design but is manufacturable and works perfectly fine. When I try to generate a Gerber for the Top or Bottom layers

the Gerber comes out fine. But Most of the middle layers are Etch's and via's for power and grounds, but the Gerber's come mostly blank, there might be some details, but in the Gerber view everything is displayed correctly.

The design does have many close spacings, I have not changed anything in the constrains manager yet, turned off a lot of the DRC's, but thinking there might be something wrong with the constrains.

I find that the CSet is set to 2_18, not sure yet what this means, also there are many of these definitions, PCS 3,4,5,ect, are the same as CSet 2_18 any suggestions would be great, we are currently looking into this, have seen

that even small change in constraint manager can cause long processing and even Allegro crashing, this is a large project.

Thanks Much, Thanks, Mike Pollock.

rpawar over 3 years ago

Try running Dbdoctor first on the design and once Gerber is generated, try to import the same again in Allegro on some dummy layer.

Also in the Artwork control form define some Undefined line width for particular film
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MPollock over 3 years ago in reply to rpawar

Ok thanks much for the feedback
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