# Problem with Leased Tag Group

**URL:** <https://forum.inductiveautomation.com/t/problem-with-leased-tag-group/33070>\
**Category:** Ignition Early Access\
**Tags:** ignition80, perspective\
**Created:** [March 13, 2020, 3:54pm UTC](https://forum.inductiveautomation.com/t/problem-with-leased-tag-group/33070 "2020-03-13T15:54:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![betti.francesco](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/betti.francesco/32/6309_2.png) [@betti.francesco](https://forum.inductiveautomation.com/u/betti.francesco)\
**Post date:** [March 13, 2020, 3:54pm UTC](https://forum.inductiveautomation.com/t/problem-with-leased-tag-group/33070/1 "2020-03-13T15:54:02Z")

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Hello all. I try to explain the context of the application where I’m having the issue. I have a large amount of OPC tags that represents machine parameters: those tags should not be read if not on the HMI, so I decided to use a leased tag group with a leased/driven rate of 1000 ms and a rate of 0. The application has many views that allows to acces to those parameters in a structured manner: those view are basically composed by one or more flex repeaters with a bunch of components that are bind to the parameters tags: when I load one of those views the related tags are loaded and start polling their values at the rate of 1 sec, while all the other parameters tags are idle.  
The problems is with the initial state of the tags. When I restart the gateway, or simply when I do a tags restart, all the tags are in a state of “uncertain initial value”, that means the tags values have not yet been read frmo PLC: and this is ok. What is not ok is that loading a view, I get a not really beautiful black “overlay unknown” on all the components that are bind to those tags, that disappears after 2-3 seconds, when the tag has been successfully read (problem 1). I thought it could be a graphic latency issue, so I tried with a simple page with just one native component bind to a parameter tag, and I get the same problem.  
Also, during those 2-3 seconds of “idle” state, the tag is set to it’s default value, and this value is written to the PLC: so all the parameters values are overwritten on the PLC (problem 2).  
Does anyone have any idea regarding the two problems?  
Here are the tag group’s settings:

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/a/afd426f017a8c4e64b1ab6eff26b0ea3350dcfdf.png)

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**Author:** ![kyle.demerath](https://avatars.discourse-cdn.com/v4/letter/k/5e9695/32.png) [@kyle.demerath](https://forum.inductiveautomation.com/u/kyle.demerath)\
**Post date:** [April 8, 2020, 2:58pm UTC](https://forum.inductiveautomation.com/t/problem-with-leased-tag-group/33070/2 "2020-04-08T14:58:25Z")

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If you disable the Read After Write and Optimistic Write do you still have the issue of the PLC value being overwritten?

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**Author:** ![betti.francesco](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/betti.francesco/32/6309_2.png) [@betti.francesco](https://forum.inductiveautomation.com/u/betti.francesco)\
**Post date:** [April 10, 2020, 12:31pm UTC](https://forum.inductiveautomation.com/t/problem-with-leased-tag-group/33070/3 "2020-04-10T12:31:16Z")

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Thanks for replying: I cannot make tests right now, don’t really remember but maybe we already did some test changing those parameters. Also, the value was not always overwritten, so it could possibly be a bug.  
After this post I also opened a ticket for the two problems, I’ll write here as soon as I get info.