I am currently trying to automate adding the sheet number a part is detailed at in the BOM. Currently the only way I am able to do this is to manually enter the sheet number to custom properties in the part. I tried to add $PRP:"SW-Current Sheet@Partname.SLDDRW" in the value portion of custom properties, but it just shows up blank in the actual drawing. I have also tried to do this with out the @ reference. Any ideas?