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0
Votes

Gannt virtualization error

Dear Suppor!

Gantt runs fine without virtualization, but if we turn on virtualization, we get the following error message:


Error: System.InvalidOperationException: Nullable object must have a value.

   at Syncfusion.Blazor.Gantt.Internal.TimelineHeader`1.RefreshTimeline(Object left)

   at System.Collections.Generic.List`1.ForEach(Action`1 action)

   at Syncfusion.Blazor.Gantt.Internal.ChartPane`1.RefreshChartPane(Object left)

   at System.Collections.Generic.List`1.ForEach(Action`1 action)

   at Syncfusion.Blazor.Gantt.Internal.ChartPane`1.RefreshChart(Object args)

   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)

   at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.ExecuteSynchronously(TaskCompletionSource`1 completion, SendOrPostCallback d, Object state)

   at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<>c.<.cctor>b__23_0(Object state)

   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)

--- End of stack trace from previous location ---

   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

   at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.ExecuteBackground(WorkItem item)




What could be the problem ?