# Nightly Changelogs - 2019

**URL:** <https://forum.inductiveautomation.com/t/nightly-changelogs-2019/21716>\
**Category:** Ignition Early Access\
**Tags:** changelog\
**Created:** [January 7, 2019, 5:01pm UTC](https://forum.inductiveautomation.com/t/nightly-changelogs-2019/21716 "2019-01-07T17:01:27Z")\
**Posts on this page:** 1\
**Showing post:** 182

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**Author:** ![Paul.Scott](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul.scott/32/4578_2.png) [@Paul.Scott](https://forum.inductiveautomation.com/u/Paul.Scott)\
**Post date:** [December 17, 2019, 5:35pm UTC](https://forum.inductiveautomation.com/t/nightly-changelogs-2019/21716/182 "2019-12-17T17:35:52Z")

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Nightly Changelog: 8.0.8-b20191217

## Allen-Bradley Drivers

**9881: Create new configurable simulator driver and replace all 3 existing simulators with it.**  
Combined the Dairy Demo, Generic, and SLC simulator device connections into a single driver. In addition, added the ability to create custom instructions in the driver, providing an opportunity to create a custom simulator device connection.

## Ignition Platform

**11311: Add system functions that can manipulate rosters.**  
Created a new system.roster package, which contains several functions that provide roster manipulation, including adding and remove users from a roster.

## Perspective

**15439: prevented in/out parameter loop by using structural comparator**  
Fixed an issue that could cause render loop on embedded views with bidirectionally bound in/out parameters.

**15438: Null value can get written back to tag when bidirectionally bound to an embedded view param**  
Fixed an issue where bindings on child properties would persist after deleting an ancestor property.

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