.NET

[#1]

I have been trying to figure this out for a while and I just can't pin point why I get a fatal exception when running this code (see code below).

I have done this same code (for the mose part) to import pagesetups into the active document and it works fine.  however when I run it as it is here to import the page setups into other drawings it seems to always crash autocad.

please help!!!!

Code:

Private Sub copy_click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles copy.Click
        Dim psdb As New Database(False, True)
        psdb.ReadDwgFile("M:\CAD Management\CAD Files\Template\Basic.dwt", FileOpenMode.OpenForReadAndReadShare, True, "")
        For Each item In ListBox1.Items
            Dim db As New Database(True, False)
            db.ReadDwgFile(item.ToString, FileOpenMode.OpenForReadAndAllShare, False, "")
            Using trans As Transaction = psdb.TransactionManager.StartTransaction
                Using trns As Transaction = db.TransactionManager.StartTransaction
                    Dim psd As DBDictionary = trans.GetObject(psdb.PlotSettingsDictionaryId, OpenMode.ForRead)
                    Dim id As ObjectId
                    Dim pd As DBDictionary = trns.GetObject(db.PlotSettingsDictionaryId, OpenMode.ForRead)
                    For Each entry As DBDictionaryEntry In pd
                        pd.UpgradeOpen()
                        pd.Remove(entry.Value)
                        pd.DowngradeOpen()
                    Next
                    For Each psent As DBDictionaryEntry In psd
                        id = psd.GetAt(psent.Key)
                        Dim ps As PlotSettings = id.GetObject(OpenMode.ForRead)
                        Dim curps As PlotSettings = New PlotSettings(False)
                        curps.CopyFrom(ps)
                        curps.AddToPlotSettingsDictionary(db)
                        curps.DowngradeOpen()
                    Next
                    trns.Commit()
                    db.SaveAs(item.ToString, DwgVersion.Current)
                    db.CloseInput(True)
                    db.Dispose()
                    trns.Dispose()
                End Using
                trans.Dispose()
            End Using
        Next
        psdb.CloseInput(True)
        psdb.Dispose()
        Me.Close()
    End Sub

[#2]

Hello,

What type of exception are you getting? What line are you getting the exception on?

[#3]

Hello,

here is the error that I get:

FATAL ERROR: Unhandled Access Violation reading 0xffffffff Exception at db9acc52h

This will either happen after running the code and I start to do something else in autocad or when I close autocad.

I know it has something to so with the code that I am running as it only happens when I run the code.

also it only seems to happen with the portion of copying the pagesetups, I am not sure what the exact cause is, or which line causes it as it happens after running the code and no other errors appear except the one above.

is there a way to have it go line by line and run the code and then even after it runs have it give me any errors witht he code?

[#4]

This one is beyond me, I only asked cause your code looks similar to my own and I am encountering a similar issue.

Looks like we are both stuck then!

[#5]

My theory is that there is something that is hanging out there that I need to stop or close or something that is causeing the error, but I am not sure if that is the case or even how I can tell what it is.

If I figure out an answer and get this working I will be sure to post it.

[#6]

Doesn't Using... negate the need to Dispose() those transactions?

[#7]

Use LockDocument if you're working with external drawings,

search for "Unhandled Access Violation" on this NG

~'J'~

[#8]

would I lock each external document?

or where would I use the LockDocument?

[#9]

Use DocumentLock just for current drawing:

databse db=hostapplicationservices.workingdatabase

document doc=application.documentmanager.mdiactivedocument

using doclock as  DocumentLock= doc.LockDocument' current document where you working

using newdb as Database=Readdwg()

using tx as transaction=db.transactionmanager.starttransaction

'' do you work here

end using 'tx

end using 'newdb

end using'' doclock

[#10 · Accepted solution]

ok, I have changed my code on this and I have finally gotten it to work without crashing autocad.

not sure if it is the dispose parts that I have added

or if it was the exit for parts that I have added, put either way it works without crashing.

hope this helps others

code:

    Private Sub copy_click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles copy.Click
        Using lock As DocumentLock = Application.DocumentManager.MdiActiveDocument.LockDocument
            Try
                Dim psdb As New Database(False, True)
                psdb.ReadDwgFile("M:\CAD Management\CAD Files\Template\Basic.dwt", FileOpenMode.OpenForReadAndReadShare, False, "")
                Using trans As Transaction = psdb.TransactionManager.StartTransaction
                    For Each item In ListBox1.Items
                        Dim db As New Database(True, False)
                        db.ReadDwgFile(item.ToString, FileOpenMode.OpenForReadAndAllShare, False, "")
                        Using trns As Transaction = db.TransactionManager.StartTransaction
                            Dim psd As DBDictionary = trans.GetObject(psdb.PlotSettingsDictionaryId, OpenMode.ForRead)
                            Dim id As ObjectId
                            Dim pd As DBDictionary = trns.GetObject(db.PlotSettingsDictionaryId, OpenMode.ForRead)
                            For Each entry As DBDictionaryEntry In pd
                                pd.UpgradeOpen()
                                pd.Remove(entry.Value)
                                pd.DowngradeOpen()
                                Exit For
                            Next
                            For Each psent As DBDictionaryEntry In psd
                                id = psd.GetAt(psent.Key)
                                Dim ps As PlotSettings = id.GetObject(OpenMode.ForRead)
                                Dim curps As PlotSettings = New PlotSettings(False)
                                curps.CopyFrom(ps)
                                curps.AddToPlotSettingsDictionary(db)
                                curps.DowngradeOpen()
                                trns.Commit()
                                curps.Dispose()
                                Exit For
                            Next
                            psd.Dispose()
                            pd.Dispose()
                        End Using
                        db.SaveAs(item.ToString, DwgVersion.Current)
                        db.CloseInput(True)
                        db.Dispose()
                        Exit For
                    Next
                End Using
                psdb.CloseInput(True)
                psdb.Dispose()
            Catch ex As System.Exception
                MsgBox(vbLf & ex.Message)
            End Try
        End Using
        Me.Close()
    End Sub