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Workaround:

Workaround Exists
Workaround Description:

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The workaround is to use a temp String variable, because it will work with #
{myStrPid}
, for example.

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The workaround is to use a temp String variable, because it will work with # {myStrPid} , for example.
Steps to Reproduce:
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Create a sample project for jBPM that has a reusable subprocess node

create a model object with a String attribute and respective get/set

try to use the attribute in the reusable subprocess node "Called Element" field using a MVEL expression.
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Create a sample project for jBPM that has a reusable subprocess node create a model object with a String attribute and respective get/set try to use the attribute in the reusable subprocess node "Called Element" field using a MVEL expression.

Error when using a model object attribute as the Called Element in a reusable subprocess in JBD tooling:

The error is:

The name #{info.pid} is not a valid process variable

Same error happens with info.getPid(), for example.