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Eagle wont let me put vias down while routing a 4 layer board
644 1 Jun 25.2019, 17:34:02

i have a 4 layer pcb that i am routing up.
It has layers (1*2)+(15*16).
When i route on the top and then select the bottom lyaer (16), it gives error "cant set via at -40,30 to layer 16".
It wont let me put vias down.
Do you know why?

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A****min

Jun 27.2019, 17:36:06

Your layer setup does not allow vias from top to bottom.
You need (1+2*3+16) for that.

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