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    <title>topic Error on Multiinstance with 0 iterations in Alfresco Archive</title>
    <link>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204821#M157951</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Hi!&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;I'm having some problems with multiinstace sub-process/task when it collection is empty and "isSequential" is false. &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;I have isolated the case with this:&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;PRE class="language-none line-numbers"&gt;&lt;CODE&gt;&lt;BR /&gt;&amp;nbsp; &amp;lt;process id="myProcess" name="My process" isExecutable="true"&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;startEvent id="startevent1" name="Start"&amp;gt;&amp;lt;/startEvent&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;userTask id="userTask" name="userTask" activiti:assignee="user"&amp;gt;&amp;lt;/userTask&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;endEvent id="endevent1" name="End"&amp;gt;&amp;lt;/endEvent&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;sequenceFlow id="flow5" sourceRef="userTask" targetRef="endevent1"&amp;gt;&amp;lt;/sequenceFlow&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;userTask id="multiInstanceTask" name="multiInstanceTask"&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;multiInstanceLoopCharacteristics isSequential="false"&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;loopCardinality&amp;gt;0&amp;lt;/loopCardinality&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;/multiInstanceLoopCharacteristics&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;/userTask&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;sequenceFlow id="flow6" sourceRef="startevent1" targetRef="multiInstanceTask"&amp;gt;&amp;lt;/sequenceFlow&amp;gt;&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;sequenceFlow id="flow7" sourceRef="multiInstanceTask" targetRef="userTask"&amp;gt;&amp;lt;/sequenceFlow&amp;gt;&lt;BR /&gt;&amp;nbsp; &amp;lt;/process&amp;gt;&lt;BR /&gt;&lt;SPAN class="line-numbers-rows"&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/CODE&gt;&lt;/PRE&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;It throws this exception when you try to start a process:&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;PRE class="language-none line-numbers"&gt;&lt;CODE&gt;&lt;BR /&gt;org.activiti.engine.impl.pvm.PvmException: already taking a transition&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:445)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.activiti.engine.impl.persistence.entity.ExecutionEntity.takeAll(ExecutionEntity.java:549)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.activiti.engine.impl.bpmn.behavior.ParallelMultiInstanceBehavior.leave(ParallelMultiInstanceBehavior.java:151)&lt;BR /&gt;…&lt;BR /&gt;&lt;SPAN class="line-numbers-rows"&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/CODE&gt;&lt;/PRE&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;But It works fine when "isSequential" is true, why? &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks!&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Wed, 19 Aug 2015 14:02:28 GMT</pubDate>
    <dc:creator>lucas_matw</dc:creator>
    <dc:date>2015-08-19T14:02:28Z</dc:date>
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      <title>Error on Multiinstance with 0 iterations</title>
      <link>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204821#M157951</link>
      <description>Hi!I'm having some problems with multiinstace sub-process/task when it collection is empty and "isSequential" is false. I have isolated the case with this:&amp;nbsp; &amp;lt;process id="myProcess" name="My process" isExecutable="true"&amp;gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;startEvent id="startevent1" name="Start"&amp;gt;&amp;lt;/startEvent&amp;gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;</description>
      <pubDate>Wed, 19 Aug 2015 14:02:28 GMT</pubDate>
      <guid>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204821#M157951</guid>
      <dc:creator>lucas_matw</dc:creator>
      <dc:date>2015-08-19T14:02:28Z</dc:date>
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    <item>
      <title>Re: Error on Multiinstance with 0 iterations</title>
      <link>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204822#M157952</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Hi,&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks for reporting this. I think it's a bug, I'll look into it tomorrow and come back with a final answer after doing some debugging.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Best regards,&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 19 Aug 2015 19:51:20 GMT</pubDate>
      <guid>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204822#M157952</guid>
      <dc:creator>trademak</dc:creator>
      <dc:date>2015-08-19T19:51:20Z</dc:date>
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    <item>
      <title>Re: Error on Multiinstance with 0 iterations</title>
      <link>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204823#M157953</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Hello trademak,&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Just to add more information. When I came to this error was on a multiiinstance sub-process with 0 iterations. &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;There is an important difference depending on which Activiti version is used,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;5.17 = throws NullPointerException&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;5.18 = no exceptions, but the new Task is not created &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks for your answer.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Fri, 21 Aug 2015 13:47:16 GMT</pubDate>
      <guid>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204823#M157953</guid>
      <dc:creator>lucas_matw</dc:creator>
      <dc:date>2015-08-21T13:47:16Z</dc:date>
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    <item>
      <title>Re: Error on Multiinstance with 0 iterations</title>
      <link>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204824#M157954</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Thanks, I've made some fixes that should resolve the issue.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Could you check against the current Github master if it resolves your issue?&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks,&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 26 Aug 2015 09:27:29 GMT</pubDate>
      <guid>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204824#M157954</guid>
      <dc:creator>trademak</dc:creator>
      <dc:date>2015-08-26T09:27:29Z</dc:date>
    </item>
    <item>
      <title>Re: Error on Multiinstance with 0 iterations</title>
      <link>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204825#M157955</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Hi!&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;I've just ran some tests with that version and it seems to work well &lt;img id="smileyhappy" class="emoticon emoticon-smileyhappy" src="https://connect.hyland.com/i/smilies/16x16_smiley-happy.png" alt="Smiley Happy" title="Smiley Happy" /&gt;&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks!&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Lucas&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 26 Aug 2015 14:52:21 GMT</pubDate>
      <guid>https://connect.hyland.com/t5/alfresco-archive/error-on-multiinstance-with-0-iterations/m-p/204825#M157955</guid>
      <dc:creator>lucas_matw</dc:creator>
      <dc:date>2015-08-26T14:52:21Z</dc:date>
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