# Allen-Bradley driver failure after upgrade to 8.1.4 **URL:** \ **Category:** Ignition\ **Created:** [April 23, 2021, 12:16pm UTC](https://forum.inductiveautomation.com/t/allen-bradley-driver-failure-after-upgrade-to-8-1-4/45953 "2021-04-23T12:16:04Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\ **Post date:** [April 23, 2021, 12:16pm UTC](https://forum.inductiveautomation.com/t/allen-bradley-driver-failure-after-upgrade-to-8-1-4/45953/1 "2021-04-23T12:16:04Z")
We upgraded to 8.1.4 and found that a problem occurred with all our Allen-Bradley devices. We are using - A-B CompactLogix (Legacy) - A-B Logix Driver - A-B ControlLogix (Legacy) - A-B SLC If we use the gateway’s OPC Quick Client we can see tag values. The tag browser is reporting “Bad failure” for each tag. - I’ve upgraded to 8.1.5 to see if there was a patch but there was no change. - There is nothing related to the A-B driver in the nightly changelog. - There doesn’t seem to be anything related in the error log. Has anyone any ideas? ---
**Author:** ![jlandwerlen](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@jlandwerlen](https://forum.inductiveautomation.com/u/jlandwerlen)\ **Post date:** [April 23, 2021, 2:04pm UTC](https://forum.inductiveautomation.com/t/allen-bradley-driver-failure-after-upgrade-to-8-1-4/45953/2 "2021-04-23T14:04:23Z")
FYI, we are using 8.1.4 with no issues, only using latest Logix drivers, no legacy. ---
**Author:** ![AnthonyF](https://avatars.discourse-cdn.com/v4/letter/a/aca169/32.png) [@AnthonyF](https://forum.inductiveautomation.com/u/AnthonyF)\ **Post date:** [April 26, 2021, 2:00am UTC](https://forum.inductiveautomation.com/t/allen-bradley-driver-failure-after-upgrade-to-8-1-4/45953/3 "2021-04-26T02:00:29Z")
We’ve had some trouble using the legacy drivers on a v20 CompactLogix, switched over to the A-B Logix Driver and had no issues since. This was on version 8.1.0 and have not tried a legacy driver since, but v8.1.4 is happy with the other driver.