<p></p>
<p>The message:</p>
<pre><code>The program 'geany' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadWindow (invalid Window parameter)'.
(Details: serial 6801 error_code 3 request_code 18 minor_code 0)
</code></pre>
<p>tells you what the problem is, the GTK library and the X server got confused about something.</p>
<p>How big is the file? How much free memory do you have? Is some internal limit of the X11 clipboard being exceeded?</p>
<p>Version 1.27 of Geany is nearly 5 years old, perhaps try a new version (1.37.1 now) and see if the problem persists.</p>

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