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We're getting 10 errors every time a bot is run. Each error looks like this:Error: Uncategorized: Test target Tests encountered an error (Timed out waiting 120 seconds for simulator to boot, current state is 1. If you believe this error represents a bug, please attach the log file at /Library/Developer/XcodeServer/Integrations/Integration-863d69d5efb05c26c9490d1c10056164/Session-2015-07-06_16:01:08-hXQWog.log)The log file referred to doesn't exist. The "/Library/Developer/XcodeServer/Integrations/" directory exists but it only includes a directory names Caches.Build and analyze are successful, but the tests do not run. The tests run successfully from my development machine. This problem seems to come and go.Sometimes we create a new bot for a branch and the errors don't initially occur, but start occurring later. On other bots, the errors initially occur, but stop occurring after several of integrations. Our integration usually takes 3 minutes. When the 10 errors occur, the integration takes 21 minutes.We're using OS X 10.10.4 (14E46), OS X Server 4.1.3 (14S1127), and Xcode 6.4 (6E35b), but have seen these errors on and off for months.Any ideas on how to resolve this?