# OPC UA struct data type?

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905>\
**Category:** Ignition\
**Created:** [July 26, 2019, 1:13pm UTC](https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905 "2019-07-26T13:13:17Z")\
**Posts on this page:** 1\
**Showing post:** 38

<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:** [March 24, 2021, 11:32am UTC](https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905/38 "2021-03-24T11:32:38Z")

</div>

Can you try editing your gateway’s ignition.conf and adding this parameter to the “Java Additional Parameters” section:

```auto
-Dignition.tags.processbackfill=true

```

It would end up looking something like this:

```auto
# Java Additional Parameters
wrapper.java.additional.1=-Ddata.dir=data
wrapper.java.additional.2=-Dignition.tags.processbackfill=true
#wrapper.java.additional.2=-Xdebug
#wrapper.java.additional.3=-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=*:8000

```

You will have to restart your gateway for this to take effect.

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