# Writing many similar items in a transaction group **URL:** \ **Category:** Ignition\ **Created:** [September 26, 2013, 2:31am UTC](https://forum.inductiveautomation.com/t/writing-many-similar-items-in-a-transaction-group/7325 "2013-09-26T02:31:44Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![seancourtney](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@seancourtney](https://forum.inductiveautomation.com/u/seancourtney)\ **Post date:** [September 26, 2013, 2:31am UTC](https://forum.inductiveautomation.com/t/writing-many-similar-items-in-a-transaction-group/7325/1 "2013-09-26T02:31:44Z")
i need some help with a transaction group. i am taking the measurements from 5 ultrasonic sensors at 300 ms intervals, and putting them into an array. I made a udt in my compactlogix to hold all five readings so the 5 readings are a single element in the array. I have 24 array elements all named similarly and because of this when i use them in a transaction group they all try to write to similar targets giving an error I tried to break up the array into UDT’S created in ignition but the same problem. Anybody have any ideas to fix this easily, other than re-naming 1 by 1 . i am going to need to do this several more times. [attachment=0]transactin group.png[/attachment] ---
**Author:** ![Robert.McKenzie](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/robert.mckenzie/32/4134_2.png) [@Robert.McKenzie](https://forum.inductiveautomation.com/u/Robert.McKenzie)\ **Post date:** [September 26, 2013, 11:31pm UTC](https://forum.inductiveautomation.com/t/writing-many-similar-items-in-a-transaction-group/7325/2 "2013-09-26T23:31:32Z")
Block Groups store multiple rows of data at the same time. You can use them to enter 5 columns of data and 1 row for each sensor. You can learn more about them in the [user manual](http://www.inductiveautomation.com/support/usermanuals/ignition/block_group.htm).