# \[TAGs\] Unknown last value

**URL:** <https://forum.inductiveautomation.com/t/tags-unknown-last-value/38892>\
**Category:** Ignition\
**Tags:** ignition80, vision\
**Created:** [September 21, 2020, 12:07pm UTC](https://forum.inductiveautomation.com/t/tags-unknown-last-value/38892 "2020-09-21T12:07:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![n.meluccio](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/n.meluccio/32/4858_2.png) [@n.meluccio](https://forum.inductiveautomation.com/u/n.meluccio)\
**Post date:** [September 21, 2020, 12:07pm UTC](https://forum.inductiveautomation.com/t/tags-unknown-last-value/38892/1 "2020-09-21T12:07:56Z")

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Hello there,  
i have a big problem with tags when i plug the ETH cable after the client is already started.  
Those tags have an overlay that says “unknown last value” (see img)

 ![1](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/5/65d045a6f56e46fa337bdb7813f261dfc3d5bf75.jpeg)

The PLC is properly connected and working, i ping it as well (tags were working before).

I’m unable to come out from this situation event if i try to restart the tag provider.  
Is there anything i can do? What could cause this problem? I’m using Rockwell direct driver, no opc involved.

Ignition v.8.0.16  
OS Windows 10 pro 64bit

Thanks in advance.

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<div class="post-metadata">

**Author:** ![n.meluccio](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/n.meluccio/32/4858_2.png) [@n.meluccio](https://forum.inductiveautomation.com/u/n.meluccio)\
**Post date:** [September 21, 2020, 12:48pm UTC](https://forum.inductiveautomation.com/t/tags-unknown-last-value/38892/2 "2020-09-21T12:48:45Z")

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UPDATE:

I tried to shutdown the PC, restart etc…and i found that by stopping/starting the gateway using .bat files in programs folder takes ignition back to normality.

What’s happening? Why should i stop/start the service?

Thanks again.  
N.