Cannot determine the board outline ? Error

[bianchi]

Dear Kicad Forum Members,

I want to export my pcb to step but I got :
Cannot determine the board outline ? Error…

Please have a look on my screen shot,
How to solve it ?

Thanks

[kenyapcomau]

What’s at the coordinates indicated? Sounds like you have a gap in your outline, maybe even a tiny one. Zoom in and see. Or have you drawn the outline on the wrong layer? Should be Edge Cuts.

[eelik]

[bianchi]

You’re right, I have fixed it, and it works, thanks