Illustrator CC graph file is opening with an "Offending Operator: inf" error.

Illustrator CC graph file is opening with an "Offending Operator: inf" error and then proceeds to open a file with half to all of the data and elements missing. How Do I fix that or can it be fixed? One in ten graph/chart file I do with Illustrator CC is opening like that. I can open the file in CS6 Illustrator but it flattens the file so that I lose all my data and layers. The full error reads like this:

Offending Operator: ing

Context:     % 0 1 0 0 0 Xy

                  % 4 0 Gx 6 Gr GX

                  % 1 -1 3 0 -1 Gf

                  % 0 O

                  % inf

Is this something with CC Illustrator graph tool, character styles or what?

Thanks anyone if you can help.

Ellen