Preview Canvas does not work

My Preview Canvas does not work anymore.

I already uninstalled and freshly reinstalled Xcode (App Store Version and direct download from developer.apple.com, version 13.2 with Big Sur and now updated to Monterey 12.1). I uninstalled Xcode using AppCleaner and also by clearing the clang/cache folders, as well as Lib/Dev... etc. manually, but the same error comes up over and over again.

When I run the code directly (via Run/Simulator instead of Preview/Canvas) the app shows up and works just fine.

I open Xcode, I create a new project for iOS, I resume the preview and it fails with the attached error...

Preview Canvas Diagnostics

Any help would be greatly appreciated as at the moment, I don't have a running development environment unfortunately...

Thanks in advance.

Best regards Silvio

Up vote post of bergersilvio Down vote post of bergersilvio
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Posted by
bergersilvio
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  • Same problem here.

    —
    seamount

  • I had that error for a while and removing the cache helped but then I got a new error:

    MessageSendFailure: Message send failure for update

    ==================================

    |  RemoteHumanReadableError: The operation couldn’t be completed. XPC error received on message reply handler

    |  

    |  BSServiceConnectionErrorDomain (3):

    |  ==NSLocalizedFailureReason: XPC error received on message reply handler

    |  ==BSErrorCodeDescription: OperationFailed

    —
    snackdog

  • It seems my error is only occurring with the SwiftUI view has an @FocusState variable.

    —
    snackdog
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Accepted Reply

This fixed it for me:

  1. Finder > Go to folder "/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/"
  2. Remove "SwiftShims-2TTN5UXQBRCCQ.pcm" (I kept a copy on my desktop just in case)
  3. Run a build in the simulator
  4. Preview now works (for me at least)

Hope this works for you.

Posted by
seamount
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Post marked as solved

  • Hi @seamount Thanks a lot! It worked for me as well. :-)

    —
    bergersilvio

  • Man you are a life saver @seamount . This was driving me up the wall.

    —
    2point5

  • Boom! Excellent tip, @seamount! Can't thank you enough. Have spent hours searching for a solution. What a relief. Thanks again!

    —
    dmiannay

Replies

This fixed it for me:

  1. Finder > Go to folder "/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/"
  2. Remove "SwiftShims-2TTN5UXQBRCCQ.pcm" (I kept a copy on my desktop just in case)
  3. Run a build in the simulator
  4. Preview now works (for me at least)

Hope this works for you.

Posted by
seamount
Up vote reply of seamount Down vote reply of seamount
Post marked as solved

  • Hi @seamount Thanks a lot! It worked for me as well. :-)

    —
    bergersilvio

  • Man you are a life saver @seamount . This was driving me up the wall.

    —
    2point5

  • Boom! Excellent tip, @seamount! Can't thank you enough. Have spent hours searching for a solution. What a relief. Thanks again!

    —
    dmiannay

Also using 13.2.1 helps ... but that version then has other issues.

Posted by
holgerflick
Up vote reply of holgerflick Down vote reply of holgerflick

  • I don't think so - I got this issue right after I updated to 13.2.1, didn't have it on 13.2 (although 13.2 didn't work properly with apps made in Playgrounds 4).

    —
    VokounApps
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Sometimes Commmand + Shift + K, which is clean also works. It solved it for me. Worth mentioning

Posted by
AdvaitaSinha
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Thanks, I was encountering the same error from the recent upgrade, and COMMAND + SHIFT + K restored my preview.

Posted by
Wovoka
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