# Error reading some addresses disappears if I rename the device

**URL:** <https://forum.inductiveautomation.com/t/error-reading-some-addresses-disappears-if-i-rename-the-device/21763>\
**Category:** Ignition\
**Created:** [January 9, 2019, 2:01pm UTC](https://forum.inductiveautomation.com/t/error-reading-some-addresses-disappears-if-i-rename-the-device/21763 "2019-01-09T14:01:51Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rdelasheras](https://avatars.discourse-cdn.com/v4/letter/r/8e7dd6/32.png) [@rdelasheras](https://forum.inductiveautomation.com/u/rdelasheras)\
**Post date:** [January 9, 2019, 2:01pm UTC](https://forum.inductiveautomation.com/t/error-reading-some-addresses-disappears-if-i-rename-the-device/21763/1 "2019-01-09T14:01:51Z")

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Hello,

One of my TCP Modbus devices named AGR\_1 has tags in addresses from 124 to 137 in WORDS memory. Some days ago, tags attached to addresses 126, 127, … 137 has quality Unknown.

In the QuickClient of the gateway, I have subscribed to addresses and I can read addresses 124 and 125. But any of the other addresses (126, 127, …) says  
“[Uncertain\_InitValue] The value is an initial value for a variable that normally receives its value from another variable”.

If I rename the Device I can read all the addresses correctly. But if I turn to the AGR\_1 name I have the same problem. I have tried to delete the Device and re-create it and I have the same problem. I have restarted gateway, modubles, clients, PC, …

I have 100 similar devices working correctly. In fact, this device was working correctly until few days ago. _Offtopic_ I’m very happy with Ignition 🙂 _Offtopic_

What more can I check?

Thanks!

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [January 9, 2019, 2:15pm UTC](https://forum.inductiveautomation.com/t/error-reading-some-addresses-disappears-if-i-rename-the-device/21763/2 "2019-01-09T14:15:26Z")

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IIRC, there are some circumstances (Bug!) where the OPC server itself caches bad metadata for a devicename/address combination. Restarting the device isn’t enough. Either restart the OPC/UA module or the entire gateway.

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**Author:** ![rdelasheras](https://avatars.discourse-cdn.com/v4/letter/r/8e7dd6/32.png) [@rdelasheras](https://forum.inductiveautomation.com/u/rdelasheras)\
**Post date:** [January 9, 2019, 2:30pm UTC](https://forum.inductiveautomation.com/t/error-reading-some-addresses-disappears-if-i-rename-the-device/21763/3 "2019-01-09T14:30:10Z")

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Thank you for the response! But yes, as I said in my message, I restarted the module (OPC/UA), the gateway and the PC where the gateway is running.