# BadFilterNotAllowed subscribing to a boolean

**URL:** <https://forum.inductiveautomation.com/t/badfilternotallowed-subscribing-to-a-boolean/8814>\
**Category:** Ignition\
**Created:** [July 30, 2014, 2:31pm UTC](https://forum.inductiveautomation.com/t/badfilternotallowed-subscribing-to-a-boolean/8814 "2014-07-30T14:31:11Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![giles](https://avatars.discourse-cdn.com/v4/letter/g/c68b51/32.png) [@giles](https://forum.inductiveautomation.com/u/giles)\
**Post date:** [July 30, 2014, 2:31pm UTC](https://forum.inductiveautomation.com/t/badfilternotallowed-subscribing-to-a-boolean/8814/1 "2014-07-30T14:31:11Z")

</div>

Hi, your UA server is returning BadFilterNotAllowed when I am subscribing to a boolean.

The issue seems to be around the deadband (I’m guessing the subscription is sending a zero)

I’ve told OPLCLabs about it here [opclabs.com/forum/ua-reading … -a-boolean](http://www.opclabs.com/forum/ua-reading-writing-subscriptions/1415-badfilternotallowed-with-reactive-subscription-to-a-boolean)

but I am wondering if anything can be done about it your end.

(I assume this problem is just with your server)

---

<div class="post-metadata">

**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [July 30, 2014, 3:44pm UTC](https://forum.inductiveautomation.com/t/badfilternotallowed-subscribing-to-a-boolean/8814/2 "2014-07-30T15:44:31Z")

</div>

I think you’ll need to create the monitored item using a different change filter (or none at all). You’re probably trying to use a deadband, which isn’t allowed on non-numeric types.