# Transaction Group Unable to Start, task problem

**URL:** <https://forum.inductiveautomation.com/t/transaction-group-unable-to-start-task-problem/88649>\
**Category:** Ignition\
**Created:** [April 10, 2024, 4:25pm UTC](https://forum.inductiveautomation.com/t/transaction-group-unable-to-start-task-problem/88649 "2024-04-10T16:25:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Alexandre\_Pasquereau](https://avatars.discourse-cdn.com/v4/letter/a/9e8a1a/32.png) [@Alexandre\_Pasquereau](https://forum.inductiveautomation.com/u/Alexandre_Pasquereau)\
**Post date:** [April 10, 2024, 4:25pm UTC](https://forum.inductiveautomation.com/t/transaction-group-unable-to-start-task-problem/88649/1 "2024-04-10T16:25:22Z")

</div>

Hi,

I have a problem with a transaction group that doesn't start. The settings of the group are good, I compared with other groups that are working well. In the logs I have this error:

```auto
java.lang.IllegalArgumentException: There is already a scheduled task for sql bridge.swecos_pcp.mill5_milling limits.mainexec
at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine.register(BasicExecutionEngine.java:407)
at com.inductiveautomation.factorysql.groups.AbstractGroup.startExecution(AbstractGroup.java:360)
at com.inductiveautomation.factorysql.ProjectRunner.loadGroupResource(ProjectRunner.java:286)
at com.inductiveautomation.factorysql.ProjectRunner.lambda$onResourcesModified$2(ProjectRunner.java:174)
at java.base/java.util.ArrayList.forEach(Unknown Source)
at com.inductiveautomation.factorysql.ProjectRunner.onResourcesModified(ProjectRunner.java:174)
at com.inductiveautomation.ignition.gateway.project.ProjectLifecycle$LifecycleResourceListener.resourcesModified(ProjectLifecycle.java:176)
at com.inductiveautomation.ignition.common.project.AbstractProject.notifyResourceListeners(AbstractProject.java:351)
at com.inductiveautomation.ignition.common.project.AbstractProject.updateEffectiveState(AbstractProject.java:153)
at com.inductiveautomation.ignition.common.project.RuntimeProject.applyChange(RuntimeProject.java:274)
at com.inductiveautomation.ignition.gateway.project.ProjectLifecycleFactory$1.lambda$updateOrStartAffectedProjects$5(ProjectLifecycleFactory.java:185)
at java.base/java.util.ArrayList.forEach(Unknown Source)
at com.inductiveautomation.ignition.gateway.project.ProjectLifecycleFactory$1.updateOrStartAffectedProjects(ProjectLifecycleFactory.java:165)
at com.inductiveautomation.ignition.gateway.project.ProjectLifecycleFactory$1.projectUpdated(ProjectLifecycleFactory.java:143)
at com.inductiveautomation.ignition.gateway.project.BaseProjectManager.doProjectUpdatedNotification(BaseProjectManager.java:1055)
at com.inductiveautomation.ignition.gateway.project.BaseProjectManager.lambda$fireProjectUpdated$25(BaseProjectManager.java:1005)
at com.inductiveautomation.ignition.gateway.project.BaseProjectManager.lambda$submitToQueue$22(BaseProjectManager.java:983)
at com.inductiveautomation.ignition.common.util.ExecutionQueue$PollAndExecute.run(ExecutionQueue.java:239)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)

```

I don't know what is this task problem, I tried to check in the gateway about that but I didn't find anything. If you have any idea please let me know