[Solved]Exception - R6016 – not enough space for thread data

[BillMunro]

I am having a problem with the trial version of PDF Creator 3.0. In my test application I create a small class that wraps acPDFCreatorLib.

The class doesn’t do much; it just calls the Merge method to merge a watermark (pdf) into another PDF document. It works fine. In the button click handler of my test app I instantiate my wrapper class, and then call the method that calls Merge. It works fine for the first couple of times but then I get the exception shown below.

If I persist my class across button clicks, rather than creating and destroying class instances on each click, I don’t see the error.

Is it possible that this issue only exists in the trial version? I don’t have a license key to test with. (I will be purchasing PDF Creator soon). Or is there something wrong with my code or with PDF Creator?

Here is my code:

Code: Select all

   class PDFWatermark
    {
        public PDFWatermark()
        {
            acPDFCreatorLib.Initialize();
        }

        ~PDFWatermark()
        {
            acPDFCreatorLib.Terminate();
        }

        // Add Simple watermark;
        // Writes to file;
        public TimeSpan MergeWatermark(string originalFilespec, string watermarkFilespec, string finalFile)
        {
            DateTime startTime = DateTime.Now;

            using (FileStream file1 = new FileStream(originalFilespec, FileMode.Open, FileAccess.Read))
            using (FileStream file2 = new FileStream(watermarkFilespec, FileMode.Open, FileAccess.Read))
            using (FileStream file3 = new FileStream(finalFile, FileMode.Create, FileAccess.Write))
            using (IacDocument doc1 = new IacDocument(null))
            using (IacDocument doc2 = new IacDocument(null))
            {
                try
                {
                    // Opend the pdf file we want to add watermarks to
                    doc1.Open(file1, "");

                    // Open the watermark pdf file
                    doc2.Open(file2, "");

                    // merge the two documents: doc2 is merged into doc1.
                    doc2.Merge(doc1, 1);  // 2nd arg: 1=merge doc2 to every page of doc1
                                          //          2=merge doc2 to the first page of doc1

                    // save the result to a third file
                    doc2.Save(file3);
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
                finally
                {
                    file1.Close();
                    file2.Close();
                    file3.Close();
                }
            }

-Bill

Exception Details:

R6016 – not enough space for thread data. […] Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

************** Exception Text **************
System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at Amyuni.PDFCreator.IacDocument.Dispose(Boolean disposing)
at Amyuni.PDFCreator.IacDocument.Dispose()
at PDFAddWatermark.PDFWatermark.MergeWatermark(String originalFilespec, String watermarkFilespec, String finalFile) in C:\Applications\DotNetTools\PDFAddWatermark\PDFAddWatermark\PDFWatermark.cs:line 77
at PDFAddWatermark.frmAddWatermark.button1_Click(Object sender, EventArgs e) in C:\Applications\DotNetTools\PDFAddWatermark\PDFAddWatermark\frmAddWatermark.cs:line 37
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[BillMunro]

Never mind. I solved the problem by having my wrapper class implement IDisposable.

-Bill