# \[BUG\] UDT tags not always inheriting their parents parameters

**URL:** <https://forum.inductiveautomation.com/t/bug-udt-tags-not-always-inheriting-their-parents-parameters/24678>\
**Category:** Ignition Early Access\
**Created:** [May 6, 2019, 7:20am UTC](https://forum.inductiveautomation.com/t/bug-udt-tags-not-always-inheriting-their-parents-parameters/24678 "2019-05-06T07:20:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![tordvd](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/tordvd/32/11525_2.png) [@tordvd](https://forum.inductiveautomation.com/u/tordvd)\
**Post date:** [May 6, 2019, 7:20am UTC](https://forum.inductiveautomation.com/t/bug-udt-tags-not-always-inheriting-their-parents-parameters/24678/1 "2019-05-06T07:20:20Z")

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I have an OPC address i would like all the childs of my UDT to inherit. Sometimes the parameters are not properly inherited.  
I see the address substituted as  
ns=1;s={OPCTopic}Global.Tag01.IntlkTrip.Ack  
Insted of:  
ns=1;s=[TagAddress01]Global.Tag01.IntlkTrip.Ack  
Picture of a member of the UDT which dont work:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/3/34b82abd23576f1dc557a66a85a1b7aafdb9717e.png)  
Picture of a member of the same UDT which actually work:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/5/56d77b216c3f1244ca2c7b3125592ef76559aa71.png)  
Paremeter input for both child UDTs (P\_Alarm):

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/f/ff67906fa0f931a22277bcd43cd0c0f9c8d43689.png)

Sidenote, i cant seem to create this bug when I create a UDT from scratch. It could be that the bugs originates from the conversion from 7.9 to 8. Anyways, I am currently not able to bypass this bug (and creating all the UDT’s from scratch would take a long time)

Nightly build (last week)

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<div class="post-metadata">

**Author:** ![mgross](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mgross/32/3311_2.png) [@mgross](https://forum.inductiveautomation.com/u/mgross)\
**Post date:** [May 6, 2019, 2:26pm UTC](https://forum.inductiveautomation.com/t/bug-udt-tags-not-always-inheriting-their-parents-parameters/24678/2 "2019-05-06T14:26:08Z")

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Might be best to get into contact with Support about this one. If you can, be prepared to share a 7.9 gateway backup or tag export, and details on a specific UDT where the UDT parameters did not convert as expected.

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<div class="post-metadata">

**Author:** ![tordvd](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/tordvd/32/11525_2.png) [@tordvd](https://forum.inductiveautomation.com/u/tordvd)\
**Post date:** [May 7, 2019, 4:45am UTC](https://forum.inductiveautomation.com/t/bug-udt-tags-not-always-inheriting-their-parents-parameters/24678/3 "2019-05-07T04:45:39Z")

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Ok, I actually found a work around last night:  
For each UDT child (which is also a UDT), using passed parameters:  
adding a character to each parameter  
appying,  
removing the character again  
applying

This solved the issue,