Error when selecting edges for CAM contour

[Anonymous]

Hi folks. I am trying to select a few edges in a simple part in order to create a laser job from, and it is giving an error:

Warning: One or more passes were discarded due to linking constraints.
Generation completed with 1 warning(s) in 786.2ms.

This is my part

I am going to be using the DXF export post, so pretty much all the setup and contour options are probably ignorable, as long as it generates paths compensated for a 0.3mm kerf.

[LibertyMachine]

Your part is not visible to those following that link. Could you export and share your file? 

File > Export > Save to local folder. Return to thread and attach the .f3d file

[Anonymous]

Oops, I thought I had shared it. I have edited the original post and added an attachment.

[LibertyMachine · Accepted solution]

Your lead-in is too large. Set it to a value of 4mm or smaller

[Anonymous]

Perfect, thank you! I'm still working my way through the CAM stuff.