Wont open most of my dwg files

I use my Ipad regularly in conjucntion with work I do on a personal laptop. I wanted the ability to look at and do some basic markups of dwg files on the ipad.
I purchased pro version and am very disappointed..It will not open most of my dwg files which arent very big or complex.. They open fine on my laptop using draftsight64(same company)Support answered quickly , but stated there are known issues, and I could send them a file for them to check. Not what I was hoping for..
If you need something reliable... beware.

Dmcgregor123 about eDrawings Pro, v3.2.0