I was at this hour and am going to start flipping tables. This problem arose out of nowhere after successfully working on this application for a month. No changes to build settings or build diagrams or anything I can think of.
If I create and run the application on iPhone 4, I have no problem at all. If I create and run the application on iPhone5S, it will be:
At the first attempt : Build successfully, appears to install the application on the device and launch it, but then execute with the error: failed to start ...... /MyApp.app '- - NotFound ".
In the second attempt : create, run, have a happy little debugging session, and everything is fine and dandy.
On the third attempt : successfully create the application, and then crash "with an error: failed to start" ... /MyApp.app "- failed to complete the task for process -1". Then the phone will stop responding, and the only way to return it is to hard reset.
I had this problem once or twice in the last few weeks, but everything was fine after the reset. Turning build on or off for arm64 doesn't seem to make any difference, and I can't think of anything else that could be different between the two devices.
Even a hint would be appreciated.
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