# OPC Tag's Quality

**URL:** <https://forum.inductiveautomation.com/t/opc-tags-quality/53412>\
**Category:** Ignition\
**Created:** [November 24, 2021, 1:21am UTC](https://forum.inductiveautomation.com/t/opc-tags-quality/53412 "2021-11-24T01:21:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Ivan\_Espana](https://avatars.discourse-cdn.com/v4/letter/i/57b2e6/32.png) [@Ivan\_Espana](https://forum.inductiveautomation.com/u/Ivan_Espana)\
**Post date:** [November 24, 2021, 1:21am UTC](https://forum.inductiveautomation.com/t/opc-tags-quality/53412/1 "2021-11-24T01:21:17Z")

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Hi, I’m trying to use Programmable Device Simulator with a OPC UA Connection in my project loading a .csv file (using realistic function). When I did the connections the first day, components in Designer Launcher work, but a few days later when I open the project, didn’t work. It marks Uncertain\_LastKnownValue and the tag’s value don’t change. Maybe it is happens because the first day I used a different provider internet? How I can solve this? Thanks.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/9/e97506506c0b5e8bc0b4d4670a532b142ad428df.png)