My results reporting view (SeriesResults below) worked fine until I selected a simulator or device running 17.4. I reported it in feedback 2 weeks ago, but have had no response. Perhaps someone can suggest a cause and/or a workaround?

It compiles OK, but as soon as this view tries to display (before the render is called), I get a fatal error: XCode flags the myRenderer.render line:

Thread 1: Fatal error: 'try!' expression unexpectedly raised an error: SwiftData.SwiftDataError(_error: SwiftData.SwiftDataError._Error.loadIssueModelContainer)

Console Shows CoreData info:

CoreData: debug: CoreData+CloudKit: NSCloudKitMirroringDelegate managedObjectContextSaved(3113) <NSCloudKitMirroringDelegate: 0x600003d042d0>: Observed context save: <NSPersistentStoreCoordinator: 0x60000290d5e0> - <NSManagedObjectContext: 0x60000390e3c0> CoreData: error: Store failed to load. <NSPersistentStoreDescription: 0x600000d0a100> (type: SQLite, url: file :/// dev/null) with error = Error Domain=NSCocoaErrorDomain Code=134060 "A Core Data error occurred." UserInfo={NSLocalizedFailureReason=The configuration named 'default' does not contain any entities.} with userInfo { NSLocalizedFailureReason = "The configuration named 'default' does not contain any entities."; } _SwiftData_SwiftUI/ModelContainer+Extensions.swift:6: Fatal error: 'try!' expression unexpectedly raised an error: SwiftData.SwiftDataError(_error: SwiftData.SwiftDataError._Error.loadIssueModelContainer) error: Store failed to load. <NSPersistentStoreDescription: 0x600000d0a100> (type: SQLite, url: file :/// dev/ null) with error = Error Domain=NSCocoaErrorDomain Code=134060 "A Core Data error occurred." UserInfo={NSLocalizedFailureReason=The configuration named 'default' does not contain any entities.} with userInfo { NSLocalizedFailureReason = "The configuration named 'default' does not contain any entities."; } Unresolved error loading container Error Domain=NSCocoaErrorDomain Code=134060 "A Core Data error occurred." UserInfo={NSLocalizedFailureReason=The configuration named 'default' does not contain any entities.}

struct SeriesResults: View {
    @Environment(\.modelContext) private var modelContext
    @Environment(\.dismiss) var dismiss

    var series : Series

    var body: some View {
        Spacer()
        VStack {
            HStack {
                Text("  < Dismiss").onTapGesture {
                    dismiss()
                }.foregroundColor(.blue)
                Spacer()
                ShareLink("PDF", item: render())

            }
            Spacer()
            Text(series.seriesName).font(.title2)
            HStack {
                Spacer()
                Text(series.seriesScoring.rawValue).font(.subheadline)
                Spacer()
                Text("\(series.numThrows) Thrown Out")
                Spacer()
            }
            Spacer()
            SeriesResultsView(series: series)
        }
        .onAppear {
            series.updateResults()
        }
    }

    @MainActor func render() -> URL {
        // 1: Render Results with some modifiers
        let myRenderer = ImageRenderer(content: SeriesResultsViewForSharing(series: series)
        )

        // 2: Save it to our documents directory
        let url = URL.documentsDirectory.appending(path: "regattaScores.pdf")

        // 3: Start the rendering process
        myRenderer.render { size, context in
            // 4: Tell SwiftUI our PDF should be the same size as the views we're rendering
            var box = CGRect(x: 0, y: 0, width: size.width, height: size.height)

            // 5: Create the CGContext for our PDF pages
            guard let pdf = CGContext(url as CFURL, mediaBox: &box, nil) else {
                return
            }

            // 6: Start a new PDF page
            pdf.beginPDFPage(nil)

            // 7: Render the SwiftUI view data onto the page
            context(pdf)

            // 8: End the page and close the file
            pdf.endPDFPage()
            pdf.closePDF()
        }
        return url
    }
}

I was able to "work around" this by adding a modelContext modifier to the imageRenderer. If anyone can shed light on why this is needed (and why it was not in iOS 17.2 but is in 17.4!) I think I could learn something!

  @MainActor func render() -> URL {
        // 1: Render Results with some modifiers
        let myRenderer = ImageRenderer(content: ResultsViewForSharing(regatta: regatta)
            .modelContext(modelContext)
        )