# Debug Evaluation Error on Transaction Group **URL:** \ **Category:** Ignition\ **Created:** [June 22, 2020, 7:12pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886 "2020-06-22T19:12:16Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![kaushik.shah](https://avatars.discourse-cdn.com/v4/letter/k/34f0e0/32.png) [@kaushik.shah](https://forum.inductiveautomation.com/u/kaushik.shah)\ **Post date:** [June 22, 2020, 7:12pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886/1 "2020-06-22T19:12:16Z")
How to debug this ? Can’t see anything in Log or in events ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/2/7/278e1e297c21b04086392b3f66230fd958ee4a94.png) Thanks !!! ---
**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\ **Post date:** [June 22, 2020, 8:48pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886/2 "2020-06-22T20:48:28Z")
What’s the expression for the item? ---
**Author:** ![kaushik.shah](https://avatars.discourse-cdn.com/v4/letter/k/34f0e0/32.png) [@kaushik.shah](https://forum.inductiveautomation.com/u/kaushik.shah)\ **Post date:** [June 22, 2020, 9:02pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886/3 "2020-06-22T21:02:44Z")
@JordanCClark, It’s a script call which looks something like this : ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/3/33625fa3e6d169ba7e2d56b20ac831ef6205cb5e.png) The issue is, it works 90% of the time ! Thanks ---
**Author:** ![kaushik.shah](https://avatars.discourse-cdn.com/v4/letter/k/34f0e0/32.png) [@kaushik.shah](https://forum.inductiveautomation.com/u/kaushik.shah)\ **Post date:** [June 22, 2020, 9:15pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886/4 "2020-06-22T21:15:21Z")
This is how I am calling - ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/2/62628158cb3668be7cca6e252dd3a96110729114.png) And to be sure that I don’t pass null I have this on Expression Item : ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/b/7bb248b6b5282c7cc5338497dddc331f69519de7.png) ---
**Author:** ![kaushik.shah](https://avatars.discourse-cdn.com/v4/letter/k/34f0e0/32.png) [@kaushik.shah](https://forum.inductiveautomation.com/u/kaushik.shah)\ **Post date:** [June 23, 2020, 1:22pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886/5 "2020-06-23T13:22:23Z")
🤔 🤔 🤔 ---
**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\ **Post date:** [June 23, 2020, 1:38pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886/6 "2020-06-23T13:38:08Z")
I’d try making the stringFormat expression its own item before the runScript item. See how the stringFormat is playing out. ---
**Author:** ![kaushik.shah](https://avatars.discourse-cdn.com/v4/letter/k/34f0e0/32.png) [@kaushik.shah](https://forum.inductiveautomation.com/u/kaushik.shah)\ **Post date:** [June 23, 2020, 3:16pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886/7 "2020-06-23T15:16:57Z")
> [@JordanCClark](#): > > ssion its own item before the runScript item. See how the As expected - ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/e/0e8fde420a673651eb0abdbc588baffa798c5911.png) ---
**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\ **Post date:** [June 23, 2020, 3:49pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886/8 "2020-06-23T15:49:46Z")
This is not on one with an evaluation error. Also, be sure to move it above the runscript item so it runs first. ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/0/b0beef8b822b02ebc354d5a9ad3324dc81a74828.png) ---
**Author:** ![kaushik.shah](https://avatars.discourse-cdn.com/v4/letter/k/34f0e0/32.png) [@kaushik.shah](https://forum.inductiveautomation.com/u/kaushik.shah)\ **Post date:** [June 23, 2020, 5:04pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886/9 "2020-06-23T17:04:12Z")
![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/8/b8bd58002dde5c926c649352982f72e840ed39d8.png) hmm, that explains everything !! I oweYouBeerCount = 1 Now, the question being, why I can’t see that in Events ? ---
**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\ **Post date:** [June 23, 2020, 5:18pm UTC](https://forum.inductiveautomation.com/t/debug-evaluation-error-on-transaction-group/35886/10 "2020-06-23T17:18:42Z")
It would be more likely to end up in the log.