Bulk Add Queue Items not working (Could not determine JSON object type for type System.Data.DataTable)

Hi folks,
I have DataTable which I need to add to queue, it’s having approx 10k records, so it needs to be done by bulk add.
In one process it already works fine, but in another I’m not able to make it work. It’s throwing this error:
Could not determine JSON object type for type System.Data.DataTable.

RemoteException wrapping System.ArgumentException: Could not determine JSON object type for type System.Data.DataTable.
at UiPath.Core.Activities.TaskExtensions.ThrowIfNeeded(Task task,
Boolean suppresThrowException)
at UiPath.Core.Activities.Orchestrator.BaseOrchestratorClientActivity.ThrowIfNeeded(AsyncCodeActivityContext ctx,
Task task,
Boolean suppresThrowException)
at UiPath.Core.Activities.Orchestrator.BaseOrchestratorClientActivity1.EndExecute(AsyncCodeActivityContext context, IAsyncResult result) at System.Activities.AsyncCodeActivity1.System.Activities.IAsyncCodeActivity.FinishExecution(AsyncCodeActivityContext context,
IAsyncResult result)
at System.Activities.AsyncCodeActivity.CompleteAsyncCodeActivityData.CompleteAsyncCodeActivityWorkItem.Execute(ActivityExecutor executor,
BookmarkManager bookmarkManager)

Any idea, what might be root cause?

Okay, so the issue was that one of columns in DataTable was nested DataTable and UiPath was not able to handle it without json serialization…well, point here for blue Prism, this is migration project and BP could handle that without any issue :wink:

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