><span class="returnLabel">Returns:</span></dt>
<dd>Attempt With empty feedback if successful, otherwise the error message</dd>
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<h4>eval</h4>
<pre class="methodSignature">public&nbsp;<a href="Attempt.html" title="class in com.anylogic.libraries.pypeline">Attempt</a>&nbsp;eval&#8203;(java.lang.String&nbsp;expr)</pre>
<div class="block">Evaluate an expression ("get value" / expecting a return)</div>