# Unknown property used in expression when using Java Delegate with Delegate Expression in BPMN

**URL:** <https://forum.flowable.org/t/unknown-property-used-in-expression-when-using-java-delegate-with-delegate-expression-in-bpmn/7221>\
**Category:** Flowable Engine\
**Created:** [December 15, 2020, 2:43pm UTC](https://forum.flowable.org/t/unknown-property-used-in-expression-when-using-java-delegate-with-delegate-expression-in-bpmn/7221 "2020-12-15T14:43:41Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![filiphr](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/filiphr/32/315_2.png) [@filiphr](https://forum.flowable.org/u/filiphr)\
**Post date:** [December 23, 2020, 10:17am UTC](https://forum.flowable.org/t/unknown-property-used-in-expression-when-using-java-delegate-with-delegate-expression-in-bpmn/7221/2 "2020-12-23T10:17:05Z")

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Hey @awk123123,

This seems a lot like the post you shared in [Executing Service Task from UI](https://forum.flowable.org/t/executing-service-task-from-ui/4350/7). Have a look at my [reply](https://forum.flowable.org/t/executing-service-task-from-ui/4350/8) there.

Cheers,  
Filip

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