al” memory that has been required since the last time this symbol was zeroed by SET MEMORY/SIZE=&lt;size&gt; or CANCEL MEMORY.  See more detailed discussion under  <a href="../computing-environment/MEMORY-USE.html">Understanding Ferret Memory Management Concepts and Tools</a>.<br />
 </p>
<p align="left"><strong><a id="_spawn_ok" name="_spawn_ok"></a>SPAWN_OK</strong><br />
Has a value of 1 if the last executed SPAWN command returned "success"; 0 if it was a "fail" return.</p>
<pre align="left">
yes? s