Not every graphic file creates problem for me. But next one .ai file created. Yesterday I opened Adobe Illustrator and .ai file viewed only a half of data, the rest was lost.
From drawing? save as pdf.
There is one more trick is to use keyword phrase like this illustrator repair for search machine or apply manual guide below
Check for a damaged pattern, gradient, or custom color
To determine if the problem is caused by a damaged pattern, gradient, or custom color:
1. Choose Edit > Select All and change the fill and stroke to process black.
2. Perform task 4 again to determine whether the problem occurs in a new file that does not contain the patterns, gradients, or spot colors. If the problem does not recur, re-create the pattern, gradient, or spot color in the original file.
Retrieving data ...