# Fastlane concurrent simulators cause connection abort

**URL:** <https://discuss.circleci.com/t/fastlane-concurrent-simulators-cause-connection-abort/26856>\
**Category:** Bug Reports\
**Tags:** fastlane, simulator, ios\
**Created:** [November 30, 2018, 11:51am UTC](https://discuss.circleci.com/t/fastlane-concurrent-simulators-cause-connection-abort/26856 "2018-11-30T11:51:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nikloy](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/nikloy/32/19871_2.png) [@nikloy](https://discuss.circleci.com/u/nikloy)\
**Post date:** [November 30, 2018, 11:51am UTC](https://discuss.circleci.com/t/fastlane-concurrent-simulators-cause-connection-abort/26856/1 "2018-11-30T11:51:38Z")

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Hi,  
I’m facing the same issue: [macOs plan - issue with xcrun simctl shutdown](https://discuss.circleci.com/t/macos-plan-issue-with-xcrun-simctl-shutdown/21839)

It appear when I activate the concurrent simulators in Fastlane.

The error is the following:  
`Error Domain=NSPOSIXErrorDomain Code=53 "Software caused connection abort" UserInfo={NSLocalizedDescription=Error returned in reply: Connection interrupted}`

Thanks