Error parse big file

[Traineratwot]

I get this Error

<parsererror style="display: block; white-space: pre; border: 2px solid #c77; padding: 0 1em 0 1em; margin: 1em; background-color: #fdd; color: black">
<h3>
This page contains the following errors:
</h3>
<div style="font-family:monospace;font-size:12px">
error on line 1000 at column 36: Extra content at the end of the document
</div>
<h3>
Below is a rendering of the page up to the first error.
</h3>
</parsererror>

I think it's because of the length of the file the xml itself is exactly correct

my file weighs 596 kb

If you need, I can send you my file