**description**: Cross-thread operation not valid: Control 'txtAppendMessage' accessed from a thread other than the thread it was created on.
--------------------------
<table><tr><th>Exception:</th><td>`InvalidOperationException`</td></tr>
<tr><th>Message:</th><td>`Cross-thread operation not valid: Control 'txtAppendMessage' accessed from a thread other than the thread it was created on.`</td></tr>
<tr><th>Call stack:</th><td><pre> at System.Windows.Forms.Control.get_Handle()
at System.Windows.Forms.RichTextBox.StreamOut(Stream data, Int32 flags, Boolean includeCrLfs)
at System.Windows.Forms.RichTextBox.StreamOut(Int32 flags)
at System.Windows.Forms.RichTextBox.get_Text()
at AutoWikiBrowser.MainForm.ProcessPage(Article theArticle, Boolean mainProcess) in d:\programming\autowikibrowser\AWB\AWB\Main.cs:line 1835</pre></td></tr>
</table>
**thread**: BackgroundThread
**OS**: Microsoft Windows NT 6.1.7601 Service Pack 1
**version**: AutoWikiBrowser (5.7.0.1), WikiFunctions (5.7.0.1), revision 11621 (2015-09-23 15:06:06)
**net**: 2.0.50727.5485
**duplicate**: [encountered while processing page ''[https://en.wikipedia.org/w/index.php?title=Wikipedia%3aAutoWikiBrowser%2fSandbox&oldid=682206786]'']
**site**: https://en.wikipedia.org