# Machine Learning - Chapter 13 - Migrate to Apple Watch?

**URL:** <https://forums.kodeco.com/t/machine-learning-chapter-13-migrate-to-apple-watch/75598>\
**Category:** watchOS\
**Created:** [July 5, 2019, 5:17am UTC](https://forums.kodeco.com/t/machine-learning-chapter-13-migrate-to-apple-watch/75598 "2019-07-05T05:17:17Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![timco62](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/timco62/32/81494_2.png) [@timco62](https://forums.kodeco.com/u/timco62)\
**Post date:** [July 5, 2019, 5:17am UTC](https://forums.kodeco.com/t/machine-learning-chapter-13-migrate-to-apple-watch/75598/1 "2019-07-05T05:17:17Z")

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I have been working on migrating the “GestureIt” program from iPhone to iWatch for the motion an ML sequencing, though I get the following runtime error:

" **WatchKit App Extension[8136:679751] [espresso] [Espresso::handle\_ex\_] exception=Unsupported engine type**

Has anyone experienced this error or successfully migrated this program to the Apple watch?

Thanks,

TimCo

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**Author:** ![shogunkaramazov](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/shogunkaramazov/32/108826_2.png) [@shogunkaramazov](https://forums.kodeco.com/u/shogunkaramazov)\
**Post date:** [August 21, 2019, 11:16pm UTC](https://forums.kodeco.com/t/machine-learning-chapter-13-migrate-to-apple-watch/75598/2 "2019-08-21T23:16:44Z")

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@clapollo Can you please help with this when you get a chance? Thank you - much appreciated! :]

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**Author:** ![clapollo](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/clapollo/32/81809_2.png) [@clapollo](https://forums.kodeco.com/u/clapollo)\
**Post date:** [August 21, 2019, 11:32pm UTC](https://forums.kodeco.com/t/machine-learning-chapter-13-migrate-to-apple-watch/75598/3 "2019-08-21T23:32:57Z")

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Hi @timco62, sorry I didn’t see this question before today — I only stay up to date on the Machine Learning book forum, here: [Machine Learning by Tutorials - kodeco.com Forums](https://forums.kodeco.com/c/books/machine-learning-by-tutorials)

It’s been a long time since you posted, so I hope you’ve gotten your app working. I think it’s awesome that you’re making something for the watch! Unfortunately, I’ve never written any code for one myself so I’m not sure about that specific error. However, one question I would ask: Is this error in the simulator or on the device? Because I’ve seen “Unsupported engine type” errors in the simulator before, for things that end up working without error on a device. If it’s happening on the watch itself, then I’ve got no idea, sorry!

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**Author:** ![timco62](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/timco62/32/81494_2.png) [@timco62](https://forums.kodeco.com/u/timco62)\
**Post date:** [August 22, 2019, 8:31am UTC](https://forums.kodeco.com/t/machine-learning-chapter-13-migrate-to-apple-watch/75598/4 "2019-08-22T08:31:21Z")

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Thanks for the reply, no worries. I have since upgraded to Apple’s new beta MacOS Catalina, Xcode 11, iOS 13, and WatchOS 6 and this error has not been repeated again. Appreciate the support!

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**Author:** ![clapollo](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/clapollo/32/81809_2.png) [@clapollo](https://forums.kodeco.com/u/clapollo)\
**Post date:** [August 26, 2019, 5:50pm UTC](https://forums.kodeco.com/t/machine-learning-chapter-13-migrate-to-apple-watch/75598/5 "2019-08-26T17:50:11Z")

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Great! Glad to hear you got it working!

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**Author:** ![system](https://s3.amazonaws.com/cdn.raywenderlich.com/community/forum-assets/noun-game-ghost-878668.png) [@system](https://forums.kodeco.com/u/system)\
**Post date:** [December 18, 2019, 9:17pm UTC](https://forums.kodeco.com/t/machine-learning-chapter-13-migrate-to-apple-watch/75598/6 "2019-12-18T21:17:20Z")

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Closed on December 18, 2019, 9:17pm UTC

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