# Uncaught exception executing batch contex **URL:** \ **Category:** Ignition\ **Created:** [May 10, 2021, 9:51pm UTC](https://forum.inductiveautomation.com/t/uncaught-exception-executing-batch-contex/46555 "2021-05-10T21:51:54Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![vrautomation](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/vrautomation/32/11155_2.png) [@vrautomation](https://forum.inductiveautomation.com/u/vrautomation)\ **Post date:** [May 10, 2021, 9:51pm UTC](https://forum.inductiveautomation.com/t/uncaught-exception-executing-batch-contex/46555/1 "2021-05-10T21:51:54Z")
Hello all Ignition’s fans! I have tag value change script that calculate a dataset tag and then write back this dataset to a memory tag. The dataset is good and is written in the tag. I can check in the tag and the dataset is ok. But in the logger, I have this error: “Uncaught exception executing batch contex” ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/5/756fc8993bf4452f0bbfe5d324bb1b917c8d41c1.png) Can someone help me? ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [May 10, 2021, 9:52pm UTC](https://forum.inductiveautomation.com/t/uncaught-exception-executing-batch-contex/46555/2 "2021-05-10T21:52:39Z")
Can you expand it by clicking the “+” button and let us know what version of Ignition you are using? ---
**Author:** ![vrautomation](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/vrautomation/32/11155_2.png) [@vrautomation](https://forum.inductiveautomation.com/u/vrautomation)\ **Post date:** [May 10, 2021, 9:56pm UTC](https://forum.inductiveautomation.com/t/uncaught-exception-executing-batch-contex/46555/3 "2021-05-10T21:56:58Z")
Ignition 8.0.3 The complete listing of the error is about 2000 lines. Here are the first lines. java.lang.StackOverflowError: null at java.base/java.lang.Class.privateGetPublicMethods(Unknown Source) at java.base/java.lang.Class.getMethods(Unknown Source) at org.json.JSONObject.populateMap(JSONObject.java:846) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) at org.json.JSONObject.populateMap(JSONObject.java:873) at org.json.JSONObject.(JSONObject.java:259) at org.json.JSONObject.wrap(JSONObject.java:1460) ---
**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:** [May 10, 2021, 9:59pm UTC](https://forum.inductiveautomation.com/t/uncaught-exception-executing-batch-contex/46555/4 "2021-05-10T21:59:17Z")
> [@vrautomation](#): > > java.lang.StackOverflowError Long exceptions are typical for these. IIRC, this (circular refs in JSON) was fixed not that long ago. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [May 10, 2021, 10:13pm UTC](https://forum.inductiveautomation.com/t/uncaught-exception-executing-batch-contex/46555/5 "2021-05-10T22:13:44Z")
Yes, I also think this is a bug that was fixed, and you are on a relatively ancient version so it would be worth your time to upgrade. ---
**Author:** ![vrautomation](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/vrautomation/32/11155_2.png) [@vrautomation](https://forum.inductiveautomation.com/u/vrautomation)\ **Post date:** [May 10, 2021, 10:15pm UTC](https://forum.inductiveautomation.com/t/uncaught-exception-executing-batch-contex/46555/6 "2021-05-10T22:15:39Z")
Oups sorry. I’m on 8.1.3. We just upgraded 1 month ago and we cannot upgrade until Sepasoft can support a newer version. I have other scripts that are writting dataset to memory tags. And they are working fine. So why this particular tags? I must say the script is inside a UDT. Any workaround? ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [May 10, 2021, 10:17pm UTC](https://forum.inductiveautomation.com/t/uncaught-exception-executing-batch-contex/46555/7 "2021-05-10T22:17:14Z")
It’s got something to do with the contents/objects you’ve put into the dataset… hard to say without seeing your script. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [May 10, 2021, 10:21pm UTC](https://forum.inductiveautomation.com/t/uncaught-exception-executing-batch-contex/46555/8 "2021-05-10T22:21:02Z")
Okay, found an open ticket where this StackOverflowError will occur when trying to encode a QualityCode object, so that’s one thing to look for (or by extension a QualifiedValue object).