Fusion Electronics
Working an electronics project and need help with the schematic, the PCB, or making your components? Join the discussion as our community of electronic design specialists and industry experts provide you their insight and best practices.
Showing results for 
Show  only  | Search instead for 
Did you mean: 

ODB++ export route 3 instead of route 15 warning message

Message 1 of 7
187 Views, 6 Replies

ODB++ export route 3 instead of route 15 warning message

Hi everyone,


I am testing my first 4 Layer ODB++ exports with Fusion 360.

Our layer stack is the following: Top – route 2 – route 3 – Bot. So I used the 4 layer preset and switched route 15 to route 3.

Now I see a warning message from the CAM-processor that a core ist expected between the Top and route 2 layer instead of prepreg.

If I change prepreg to core the warning message disappears but the setting is not correct in my opinion.

It would be great if someone could tell me if the warning or my setting is incorrect.


Best regards


Tags (3)
Labels (1)
Message 2 of 7

Hi Franz,

This warning is displayed when the dielectric layer type that you set in the Layer Stackup Manager differs from the one you set in the CAM Processor. Can you please open the LSM (CLI layerstack;) and make sure that the dielectric type between Top and Route2 is actually PREPREG?

The Layer Stack Manager is the core piece that drives the layer stack as well as the CAM Processor so it needs to be correct.

May I ask if you can attach a picture of your Layer Stack Manager dialog so I can see how it looks? Thanks.

Otherwise if you can't figure it out you could send me the design if you are able to share it and I will have a quick look. You can remove any IP from it just leave the minimum that shows this Layer Stack behaviour. My email address is:

Please let me know if there is anything else I can help you with.


Kind Regards,

Constantin Popescu
Principal Software Engineer
Message 3 of 7

Hello Constantin Popescu,


thank you for your fast response. You were right my design rules stated that there was core material between the layers instead of prepreg.

I downloaded the newest .dru file from our manufacturer and checked the settings, which had the right stackup.

With the new file the stackup was right, but I couldn´t switch route 15 to route 3 in fusion 360 ( I sadly have to switch this everytime due to very old eagle projects). So my workaround was to load the file into eagle than switch route 15 to 3 and save the file.

The new file works perfectly in fusion and the warnings in ODB++ are gone.

Is there a way to alter the layers in fusion 360 similar to eagle?

Again thanks for your help.


Best regards


Message 4 of 7
in reply to: franzAVJH5

Hello @franzAVJH5,


I hope you're doing well. See this image 



Choose the open from setup string option, that will allow you to setup the layers 1,2,3 and 16.


Let me know if there's anything else I can do for you.


Best Regards,

Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 5 of 7

Hi Franz,

To add one bit to Jorge's great answer, in the "Open From Setup String" dialog just copy this layer Setup string: (1+2*3+16) and that should do what you need. In this dialog you can also choose to automatically add Surface Finish, Solder-Mask and Silk-Screen layers.

I hope this helps.


Kind Regards,

Constantin Popescu
Principal Software Engineer
Message 6 of 7

This is how the Layer Stack looks after I have loaded the layer setup string above:



Kind Regards,

Constantin Popescu
Principal Software Engineer
Message 7 of 7

Hi everyone,


thank you again for your help. Your provided solution with the setup string works great.


Best regards


Can't find what you're looking for? Ask the community or share your knowledge.

Post to forums  

Autodesk Design & Make Report