7d requires Lightroom v2.6
7d Mark-II requires v5.7
If you have a 7d Mark-II, you require a Lightroom upgrade, preferably to v6 if your system supports it,
or use the free 'Adobe DNG Converter' to convert your raw CR2 files into raw DNG files then import the DNGs into LR4.
Okay so we tried that...didn't work so I upgraded to LR6. That is done and complete and now I have a biggger problem The files that were on my 7d are gone. I would assume I need a recovery program but this is a first for me so any help is extremely appreciated.
The files that were on my 7d are gone
Gone from where?
Were they in your computer somewhere?
Were they only on your camera memory card?
Have you deleted them anywhere?
Did LR6 open up your previous LR4 catalog and convert a copy to be LR6 compatible?
Have you created a 'NEW' catalog in LR6? (it will not show anything!!)
Only more questions if we can be of help-sorry!