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<div class="textblock"><div class="fragment"><div class="line">ERROR string-expression</div>
</div><!-- fragment --><p>Raises a <b>runtime error</b>.</p>
<ul>
<li>Sets the built-in variables <b>ERR$</b> (to the message) and <b>ERR</b> (to <code>1</code>) <b>when</b>:<ul>
<li>the error is raised <b>inside</b> an <a class="el" href="EVAL.html">EVAL</a>, <b>or</b></li>
<li>an error handler has been installed with <a href="https://github.com/brainboxdotcc/retro-r