allegro:can not select unplaced component
I have a PCB file(.brd) and Schematic(.pdf) from our supplier. Now,I draw the Schematic in Orcad,the footprint of the part is from PCB file. Now,something happend. what i did is as follows.
1. I export the package from pcb file.
2. Draw the Schematic in Orcad.the footprint of the part is from pcb file
3.Create netlist in Orcad.
4. open the pcb ...