Print option is grayed out

Depending on the file, when I go to print  the print button is greyed out.  

About twenty years ago, I designed a house using CorelDraw 5 (!!). It took forever, but it was fun. I have been able to import these old files into CorelDraw X6 and update them, but some of the files, while they display correctly and can be edited, are not printable. It's random. Files from the same era import just fine and are printable!!

This appears to be entirely file specific. I am wondering whether there is an attribute I can change in file properties.