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Why cant I route on 3rd and 4th layer anymore?

Question asked by richard.long on Apr 27, 2012
Latest reply on Apr 27, 2012 by jmatthews

I am laying out a small microcontroller PCB and I have just about finished. BUT! for some reason PADS has stopped allowing me to route items on layer 3 and 4. I can route to layers 1 and 2. I dont believe I changed anything by modless comand.

 

All of the layers are vissible but when I try to F2 "route" all it allows me to do is route in the other layers.I cannot complete the trace in the component layer. Have I locked the layers or something?

 

The layers were all routing perfectly  so what could have changed?

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