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