Keep getting this showing up - over and over multiple times per day in the usage section of the iphone 5 S - battery lasts "maybe" only 6 or 7 hours with VERY light usage - I'm assuming this MobileCal issue is the problem
iPhone 5s, iOS 7.0.2
Hi TMH55:
I was also curious about these "stacks+MobileCal…" crash logs and did some research into the problem. I just published a FAQ on the subject: "MobileCal has active assertions beyond permitted time."
The bottom line is that these logs result from network timeouts, e.g. Calendar attempted to sync with iCloud, but the request timed out due to a slow or interrupted network connection. I see an average of two of these logs per day and they often correlate to when I'm in an area with poor cellular data coverage. They're not affecting my battery life.
I noticed them after updating my iPhone 5 to iOS 7: iOS 7 may be more sensitive to network timeouts or may simply be logging these types of events more than in iOS 6 and earlier.
Unless you're seeing dozens of these logs per day, I'd ignore them and look into other potential causes for the battery issues.
Dr. Smoke
Author, Troubleshooting Mac OS X
I may receive some form of compensation, financial or otherwise, from my recommendation or link.
MobileCal has active assertions beyond permitted time
