# \[BUG-6737\]Transaction Groups trigger is not subscribed in Read Mode

**URL:** <https://forum.inductiveautomation.com/t/bug-6737-transaction-groups-trigger-is-not-subscribed-in-read-mode/64367>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [September 22, 2022, 12:29pm UTC](https://forum.inductiveautomation.com/t/bug-6737-transaction-groups-trigger-is-not-subscribed-in-read-mode/64367 "2022-09-22T12:29:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Davide\_Bortolini](https://avatars.discourse-cdn.com/v4/letter/d/3e96dc/32.png) [@Davide\_Bortolini](https://forum.inductiveautomation.com/u/Davide_Bortolini)\
**Post date:** [September 22, 2022, 12:29pm UTC](https://forum.inductiveautomation.com/t/bug-6737-transaction-groups-trigger-is-not-subscribed-in-read-mode/64367/1 "2022-09-22T12:29:07Z")

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Hi,  
I am setting up a transaction group in order to collect a batch of data on a trigger basis.  
I have created a transaction group with the following settings:

Action

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/c/1/c1f61210f27164a9cea465dbee2a4aea60bc19ec.png)

Trigger

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/4/4/447544346cd792978aa4d95b416ac363c271e194.png)

Options  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/0/6064d6f612ac446564393e721b5e92892b0b17ae.png)

I have set the group to Read items as the data must be consistent when the trigger fires.  
Everything seems working fine except that sometimes Ignition miss the trigger, so I further investigated the communication between Ignition and the OPC Server (Kepware) and I realized that the trigger is not get subscribed as it is described in the manual, instead the trigger is polled like other tags.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/d/0da17ccad37d1c5714dbe981ef68a9a80a053474.png)

The only PublishRequest and Response I found are related to Subscription keepalive that Ignition sets when connection go OPC server.

Am I doing something wrong or it's the standard behavior (so the manual isn't fully right).

Thank you

Davide

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<div class="post-metadata">

**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:** [September 22, 2022, 2:45pm UTC](https://forum.inductiveautomation.com/t/bug-6737-transaction-groups-trigger-is-not-subscribed-in-read-mode/64367/2 "2022-09-22T14:45:05Z")

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Sounds like a bug. You should open a ticket.

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<div class="post-metadata">

**Author:** ![Davide\_Bortolini](https://avatars.discourse-cdn.com/v4/letter/d/3e96dc/32.png) [@Davide\_Bortolini](https://forum.inductiveautomation.com/u/Davide_Bortolini)\
**Post date:** [September 22, 2022, 2:53pm UTC](https://forum.inductiveautomation.com/t/bug-6737-transaction-groups-trigger-is-not-subscribed-in-read-mode/64367/3 "2022-09-22T14:53:06Z")

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Yes seems to.  
Even more, but I think it’s connected, items in the group are constantly polled even if the trigger is not active and it shouldn’t like that according to the manual.

Davide