# \[IGN-3651\] Hello, I am continuously getting below error in error logs, though it is not impacting any functionality so far but occurrences are getting increased in logs

**URL:** <https://forum.inductiveautomation.com/t/ign-3651-hello-i-am-continuously-getting-below-error-in-error-logs-though-it-is-not-impacting-any-functionality-so-far-but-occurrences-are-getting-increased-in-logs/49127>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [July 23, 2021, 7:20am UTC](https://forum.inductiveautomation.com/t/ign-3651-hello-i-am-continuously-getting-below-error-in-error-logs-though-it-is-not-impacting-any-functionality-so-far-but-occurrences-are-getting-increased-in-logs/49127 "2021-07-23T07:20:51Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![archana.deshmukh](https://avatars.discourse-cdn.com/v4/letter/a/51bf81/32.png) [@archana.deshmukh](https://forum.inductiveautomation.com/u/archana.deshmukh)\
**Post date:** [July 23, 2021, 7:20am UTC](https://forum.inductiveautomation.com/t/ign-3651-hello-i-am-continuously-getting-below-error-in-error-logs-though-it-is-not-impacting-any-functionality-so-far-but-occurrences-are-getting-increased-in-logs/49127/1 "2021-07-23T07:20:51Z")

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![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/3/d31878320be0809fe2a00e61c7da529f0764b6c9.png)

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**Author:** ![victordcq](https://avatars.discourse-cdn.com/v4/letter/v/f6c823/32.png) [@victordcq](https://forum.inductiveautomation.com/u/victordcq)\
**Post date:** [July 23, 2021, 8:32am UTC](https://forum.inductiveautomation.com/t/ign-3651-hello-i-am-continuously-getting-below-error-in-error-logs-though-it-is-not-impacting-any-functionality-so-far-but-occurrences-are-getting-increased-in-logs/49127/2 "2021-07-23T08:32:32Z")

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> [@Perspective - Unexpected problem unregistering listener from session event bus](https://forum.inductiveautomation.com/t/perspective-unexpected-problem-unregistering-listener-from-session-event-bus/39636/3):
>
> I had this same issue, with a binding that had multiple references to the same tag. Reorganizing the binding expression to only reference the tag once seemed to have made the problem go away.

Seems it happends when you reference a tag multiple times in one expression

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<div class="post-metadata">

**Author:** ![archana.deshmukh](https://avatars.discourse-cdn.com/v4/letter/a/51bf81/32.png) [@archana.deshmukh](https://forum.inductiveautomation.com/u/archana.deshmukh)\
**Post date:** [July 23, 2021, 8:35am UTC](https://forum.inductiveautomation.com/t/ign-3651-hello-i-am-continuously-getting-below-error-in-error-logs-though-it-is-not-impacting-any-functionality-so-far-but-occurrences-are-getting-increased-in-logs/49127/3 "2021-07-23T08:35:39Z")

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just now i have added that tag into one session variable and then reference it multiple times in expression binding.lets see will it work for me or not

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**Author:** ![jspecht](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jspecht/32/6465_2.png) [@jspecht](https://forum.inductiveautomation.com/u/jspecht)\
**Post date:** [July 23, 2021, 3:33pm UTC](https://forum.inductiveautomation.com/t/ign-3651-hello-i-am-continuously-getting-below-error-in-error-logs-though-it-is-not-impacting-any-functionality-so-far-but-occurrences-are-getting-increased-in-logs/49127/4 "2021-07-23T15:33:16Z")

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Looks like a bug in Ignition. I’ve filed a ticket to take a look. Thanks for reporting it.

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**Author:** ![pratik\_jain](https://avatars.discourse-cdn.com/v4/letter/p/97f17d/32.png) [@pratik\_jain](https://forum.inductiveautomation.com/u/pratik_jain)\
**Post date:** [March 10, 2022, 4:49pm UTC](https://forum.inductiveautomation.com/t/ign-3651-hello-i-am-continuously-getting-below-error-in-error-logs-though-it-is-not-impacting-any-functionality-so-far-but-occurrences-are-getting-increased-in-logs/49127/5 "2022-03-10T16:49:23Z")

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Hello ,  
I have added multiple tags in the expression binding in perpective. It was working fine for 8.1.14 but as soon as we upgraded to 8.1.15 it started with ‘Unexpected problem unregistering listener from session event bus’ errors.