Problem running NLContextualEmbeddingModel in simulator

Question

kachebb OP

Created Sep ’25

Replies 3

Boosts 3

Views 1.4k

Participants 4

Environment MacOC 26 Xcode Version 26.0 beta 7 (17A5305k) simulator: iPhone 16 pro iOS: iOS 26

Problem NLContextualEmbedding.load() fails with the following error

In simulator

Failed to load embedding from MIL representation: filesystem error: in create_directories: Permission denied ["/var/db/com.apple.naturallanguaged/com.apple.e5rt.e5bundlecache"]
filesystem error: in create_directories: Permission denied ["/var/db/com.apple.naturallanguaged/com.apple.e5rt.e5bundlecache"]
Failed to load embedding model 'mul_Latn' - '5C45D94E-BAB4-4927-94B6-8B5745C46289'

assetRequestFailed(Optional(Error Domain=NLNaturalLanguageErrorDomain Code=7 "Embedding model requires compilation" UserInfo={NSLocalizedDescription=Embedding model requires compilation}))

in #Playground

Screenshot 2025-09-10 at 8.49.19 PM.png

I'm new to this embedding model. Not sure if it's caused by my code or environment.

Code snippet

import Foundation
import NaturalLanguage
import Playgrounds

#Playground {
    // Prefer initializing by script for broader coverage; returns NLContextualEmbedding?
    guard let embeddingModel = NLContextualEmbedding(script: .latin) else {
        print("Failed to create NLContextualEmbedding")
        return
    }

    print(embeddingModel.hasAvailableAssets)

    do {
        try embeddingModel.load()
        print("Model loaded")
    } catch {
        print("Failed to load model: \(error)")
    }
}

Boost

Answer 1

keuxdi OP

Dec ’25

Same :/

0

Answer 2

retrograde OP

Jan ’26

Also hitting this error on Xcode Version 26.0 (17A321) and iPhone simulator running iOS 26.0 (23A343)

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Answer 3

rkhamilton OP

1d

Seeing the same. Simulator will not run .load. FB22699606 filed.

    private func failingFunction() async throws {
        guard let embedding = NLContextualEmbedding(language: .english) else { return }
        print("hasAvailableAssets:", embedding.hasAvailableAssets)
        let result = try await embedding.requestAssets()
        print("requestAssets result:", result)
        try embedding.load()  // <- throws here
        let r = try embedding.embeddingResult(for: "hello world", language: nil)
        print("length \(r.sequenceLength)")
    }

Generates a 30s delay, then errors.

hasAvailableAssets: false
Type: stdio
Failed to send CA Event for app launch measurements for ca_event_type: 0 event_name: com.apple.app_launch_measurement.FirstFramePresentationMetric
Type: Error | Timestamp: 2026-05-04 19:39:07.618665-04:00 | Process: NLContextualEmbeddingLoadFailure | Library: libapp_launch_measurement.dylib | Subsystem: com.apple.app_launch_measurement | Category: General | TID: 0x225e218
Failed to send CA Event for app launch measurements for ca_event_type: 1 event_name: com.apple.app_launch_measurement.ExtendedLaunchMetrics
Type: Error | Timestamp: 2026-05-04 19:39:07.727782-04:00 | Process: NLContextualEmbeddingLoadFailure | Library: libapp_launch_measurement.dylib | Subsystem: com.apple.app_launch_measurement | Category: General | TID: 0x225e21f
objc[78708]: Class UIAccessibilityLoaderWebShared is implemented in both /Library/Developer/CoreSimulator/Volumes/iOS_23E244/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 26.4.simruntime/Contents/Resources/RuntimeRoot/System/Library/AccessibilityBundles/WebKit.axbundle/WebKit (0x109388398) and /Library/Developer/CoreSimulator/Volumes/iOS_23E244/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 26.4.simruntime/Contents/Resources/RuntimeRoot/System/Library/AccessibilityBundles/WebCore.axbundle/WebCore (0x117358310). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed.
Type: stdio
filesystem error: in create_directories: Permission denied ["/var/db/com.apple.naturallanguaged/com.apple.e5rt.e5bundlecache"]
Type: Error | Timestamp: 2026-05-04 19:39:37.695673-04:00 | Process: NLContextualEmbeddingLoadFailure | Library: NaturalLanguage | Subsystem: com.apple.NaturalLanguageFramework | Category: default | TID: 0x225e219
Compilation of '5C45D94E-BAB4-4927-94B6-8B5745C46289' model failed:Error Domain=NLNaturalLanguageErrorDomain Code=7 "Aborting repeated compilation request" UserInfo={NSLocalizedDescription=Aborting repeated compilation request}
Caller bundle id: 'com.disparateelements.NLContextualEmbeddingLoadFailure'
Type: Error | Timestamp: 2026-05-04 19:39:37.928174-04:00 | Process: NLContextualEmbeddingLoadFailure | Library: NaturalLanguage | Subsystem: com.apple.NaturalLanguageFramework | Category: default | TID: 0x225e219
Failed with error Aborting repeated compilation request
Type: Error | Timestamp: 2026-05-04 19:39:37.928618-04:00 | Process: NLContextualEmbeddingLoadFailure | Library: NLContextualEmbeddingLoadFailure.debug.dylib | Subsystem: test | Category: NLContextualEmbeddingLoadFailure | TID: 0x225e091

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