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Issue #6676 has been reported by Daniel Crawl.
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<h1><a href="https://projects.ecoinformatics.org/ecoinfo/issues/6676">Bug #6676: External Execution actors generates exception for empty directory</a></h1>
<ul>
<li>Author: Daniel Crawl</li>
<li>Status: New</li>
<li>Priority: Low</li>
<li>Assignee: Daniel Crawl</li>
<li>Category: actors</li>
<li>Target version: 2.5.0</li>
<li>Bugzilla-Id: </li>
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<p>If the directory parameter is empty for the External Execution actor, a NullPointerException is generated:</p>
<p>java.lang.NullPointerException<br /> at ptolemy.actor.lib.Exec._exec(Exec.java:516)<br /> at ptolemy.actor.lib.Exec.fire(Exec.java:337)<br /> at ptolemy.actor.AtomicActor.iterate(AtomicActor.java:496)</p>
<p>It would be better to default to user.dir or throw an exception saying directory must be specified.</p>
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