VNImageRequestHandler perform 'unspecified error' on M1 MacBook Pro

I'm getting the following error when running a simple test of VNImageRequestHandler perform in Xcode:

failed: caught error: "Error Domain=com.apple.vis Code=9 "encountered an unexpected condition: Unspecified error" UserInfo={NSLocalizedDescription=encountered an unexpected condition: Unspecified error}

The test is as follows:

Code Block 
    func testExample() throws {
        let bundle = Bundle(for: type(of: self))
        let image = UIImage(named: "image.jpeg", in: bundle, with: nil)!
        let imageRequestHandler = VNImageRequestHandler(cgImage: image.cgImage!)
        let captureQualityRequest = VNDetectFaceCaptureQualityRequest()
        try imageRequestHandler.perform([captureQualityRequest])
    }


This error is happening on Xcode 12.2 (and 12.3 beta), macOS 11.0.1, and a Late 2020 13" M1 MacBook Pro.

This does not happen on Xcode 12.2 and macOS 11.0.1 on an Intel MacBook Pro.

Sample project can be found here:
https://gitlab.com/kabucey/vnimagerequesthandlertest

Has anyone encountered this before?

Up vote post of ismconnect Down vote post of ismconnect
3.8k views
Posted by
ismconnect
Reply

  • I have this same error. Does anyone have a solution yet? Thanks.

    —
    datacausa
Add a Comment

Replies

Hello,

I'm only seeing a "Hello World" in the sample project you posted.

Also, could you try running the Image Saliency sample on your M1 MacBook.

Thanks!
Posted by
gchiste
Up vote reply of gchiste Down vote reply of gchiste
Add a Comment
This problem happens specifically with unit tests, and that test can be found in the sample project that was linked to.

The Image Saliency project runs fine but there aren't any unit tests in it.
Posted by
ismconnect
Up vote reply of ismconnect Down vote reply of ismconnect
Add a Comment
Hi,

I get the same error when running in the Simulator on a 2020 M1 MacBook Pro. On Intel everything works as expected.
Posted by
trispo
Up vote reply of trispo Down vote reply of trispo
Add a Comment

I have this same error also when running my code in iPhone simulator on my m1 MacBook Air. Does anyone have a solution yet? Thanks. 

Posted by
datacausa
Up vote reply of datacausa Down vote reply of datacausa
Add a Comment

I am getting the error on simulator with iPadOS config (iPad Pro 12.9-9inch). Running on a physical iPad - error does not occur. Simulator is running on an iMac (24-inch, M1, 2021)

Posted by
Will Loew-Blosser
Up vote reply of Will Loew-Blosser Down vote reply of Will Loew-Blosser
Add a Comment

I have the same error in xCode 13.1 while trying to run Vision in UnitTests. Did you find any solution meanwhile?

Posted by
denisa_toderean1
Up vote reply of denisa_toderean1 Down vote reply of denisa_toderean1
Add a Comment

Still a problem on XCode 13.3, even running on Rosetta. Any Vision request from a test case in the simulator throws an error.

Posted by
Colin Driver
Up vote reply of Colin Driver Down vote reply of Colin Driver
Add a Comment

This is still happening as of Xcode 13.4.1.

Posted by
spullara
Up vote reply of spullara Down vote reply of spullara
Add a Comment

This happens to me as well. Any workarounds so far?

Posted by
abalchunas
Up vote reply of abalchunas Down vote reply of abalchunas
Add a Comment

I get a slightly different error in unit tests, only on my M1 laptop:

request VNDetectFaceRectanglesRequest was cancelled

But I found a solution!

#if targetEnvironment(simulator)
    faceDetectionRequest.usesCPUOnly = true
#endif
Posted by
SocureBoris
Post not yet marked as solved Up vote reply of SocureBoris Down vote reply of SocureBoris

  • Yep! This solution works

    —
    chewethan
Add a Comment