I've had my digital copy of GTAV since Day 1 and have played it pretty much every day since release.
Came to load it tonight and after the initial Rockstar Logos flash on screen, I get:
An error has occured in the following application (CE-34878-0)
Grand Theft Auto V
Have tried it three times and no luck.
Any ideas? Just tried my digital version of Advanced Warfare and it's all fine.