I decided to uninstall, then redownload from Creative Cloud, but my Adobe Application Manager tries to launch and quits unexpectedly, over and over. I restarted my computer, but that wasn't helpful. I was considering uninstalling all of CC, but I'm concerned about the application manager issue inhibiting me from using any programs. Illustrator is working fine after an update...Help! I'm on deadline
I had the same problem. Brand new Mac Pro with a fresh installation of Creatve Cloud.
ID CC couldn't open CS6 files. Error code 4. As luck would have it I still have CS6 on an another Mac. When I have opened the file there and then did a Save As (CS6 file with another name) everything worked great. Strange.
But now with the latest ID CC update it seems to work fine to open CS6 files without error code 4.
I hope you managed to solve your problem in time?