[T?Pau]

To set a minimum character limit into the users post, just open newpost.php and newthread.php

find:

if (strlen($message)>$postmaxchars and $postmaxchars!=0) {
    eval("standarderror(\"".gettemplate("error_toolong")."\");");
  }

directly after that, insert the following:

 if (strlen($message)<20) {
    eval("standarderror(\"".gettemplate("error_tooshort")."\");");
  }

Then go to your Admin cp and create a new Template called error_tooshort
and insert:

Your Message is too short. 
Please write at least 20 characters.

You are done. Change the minimum characters (20) to your needs.