Update Draft Styles from Template -- Long delay on first file

[rmcanany]

The delay is occurring after Sub ProcessInternal finishes and its caller Sub Process itself finishes. One way to see it is to place a break point on each of those Subs at the End Sub statement.

The same thing happens with the Create Drawing of Flat Pattern command. Both open a Draft template and they're the only ones that do. I haven't witnessed the delays with any other command. Here's the caller code. (It's the same for every command.)

    Public Overrides Sub Process(
        ByVal SEDoc As SolidEdgeFramework.SolidEdgeDocument,
        ByVal SEApp As SolidEdgeFramework.Application)

        Me.TaskLogger = Me.FileLogger.AddLogger(Me.Description)

        InvokeSTAThread(
            Of SolidEdgeFramework.SolidEdgeDocument,
            SolidEdgeFramework.Application)(
                AddressOf ProcessInternal,
                SEDoc,
                SEApp)
    End Sub

InvokeSTAThread is in HCIsolatedTaskProxy. It looks like this:

    Protected Sub InvokeSTAThread(Of TArg1, TArg2)(ByVal target As Action(Of TArg1, TArg2), ByVal arg1 As TArg1, ByVal arg2 As TArg2)
        If target Is Nothing Then Throw New ArgumentNullException("target")
        Dim exception As Exception = Nothing
        Dim thread = New System.Threading.Thread(
            Sub()
                Try
                    target(arg1, arg2)
                Catch ex As System.Exception
                    exception = ex
                End Try
            End Sub)
        thread.SetApartmentState(System.Threading.ApartmentState.STA)
        thread.Start()
        thread.Join()

        If exception IsNot Nothing Then
            Throw New System.Exception("An unhandled exception has occurred. See inner exception for details.", exception)
        End If
    End Sub

@farfilli @ChrisClems can either of you think of a reason, or a way to test?

[rmcanany]

I tried the following, passing in the Template document.

On the first file processed, the first GC.WaitForPendingFinalizers() takes around 30s. From the second file onward, it takes no time at all.

    Public Sub SEGarbageCollect(ByVal obj As Object)
        Try
            '******* Added because of .NET
            If Not (obj Is Nothing) Then
                'Marshal.ReleaseComObject(obj)
                Marshal.FinalReleaseComObject(obj)
            End If

            GC.Collect(GC.MaxGeneration)
            GC.WaitForPendingFinalizers()
            GC.Collect(GC.MaxGeneration)
            GC.WaitForPendingFinalizers()
            '******* Added because of .NET
        Catch ex As Exception
            obj = Nothing
            GC.Collect(GC.MaxGeneration)
            GC.WaitForPendingFinalizers()
            GC.Collect(GC.MaxGeneration)
            GC.WaitForPendingFinalizers()

        End Try
    End Sub

[rmcanany]

Still happening with SE2025 on Create drawing of flat pattern, but not with Update drawing styles from template.