Generating a dxdesigner project from PADS layout

Hello, I am trying to create a new dxdesigner schematic by backwards annotating a layout in PADS. I was able to link to the two projects, but when I try to backwards annotate I get a lot of error messages like this:

pcb: Error 6112: file Schematic1.eco, line 44: Couldn't create new C_0402 package C102

Does anyone out there know how to fix this, or a better way to go about this in general?

Thanks,

Nathan