Warning: touch(): Utime failed: Permission denied in ..../includes/class.latex-vb.php

[pjkcards]

When I visit URLs where I'm using Latex, I get:
Warning: touch(): Utime failed: Permission denied in ..../includes/class.latex-vb.php on line 167

For example, see:
removed

What is the best way to resolve this?

Line 167 is the line that starts with "touch":

	// Check whether this thing already exists
		if (is_file($path['img'].'/'.$filename)) {
			touch($path['img'].'/'.$filename);
			return $this->path['baseurl']."/img/".$filename;
		}

I know this is for a mod I installed, but I can't seem to find the support for it, so maybe someone here can help.

Any advice would be much appreciated. Thanks.