First off, run the OrCAD Layout translator from the Accessories menu in Capture and update the footprint names. This will correct the footprint names. After that you can try to create the netlist, the PCB Editor flow will require that all parts in the schematic have Pin Names and Pin Numbers, this may require correction of the graphical symbols. Also there must be an exact match between the Pin Numbers defined in the graphical symbol and the footprint, this may require renumbering of the pins on the graphical symbol and the use of the NC property to account for pins that are not defined on the graphical symbol but do exist in the footprint. See the chapter on using Capture with PCB Editor in the Capture Users Guide, cap_ug.pdf in the doc\cap_ug directory of the installation.