Exception Background thread update GUI

Hi,

we use the followed function to update DataGrid  when data is change (a background thread run a loop to check if data is change and raises event and calls update Grid)

Application.Update(dataGrid, () =>
{
…
});

It works fine, but sometime it has exception. It looks like the javascript  for DataGrid somehow was missing: reloadData, updateRows …

Could you please point out, what is the problem?

Thanks for your help,

Page

2021-06-12 10:21:46,175 ERROR Program on_ThreadException – System.ApplicationException: Unknown function: reloadData
at Wisej.Web.Application.ProcessCallbackWebEvent(WisejEventArgs e)
at Wisej.Web.Application.ProcessWebEvent(WisejEventArgs e)
at Wisej.Web.Application.OnWebEvent(WisejEventArgs e)
at Wisej.Web.Application.Wisej.Core.IWisejComponent.Event(WisejEventArgs e)
at Wisej.Core.ComponentManager.DispatchEvents(Session session, ICollection events)
at CallSite.Target(Closure , CallSite , ComponentManager , Session , Object )
at Wisej.Core.ResponseManager.<>c__DisplayClass25_0.<OnEvent>b__0()
at Wisej.Core.IWisejSynchronizedImplementation.Lock(IWisejSynchronized target, Action action)
at Wisej.Core.ResponseManager.OnEvent(Session session, Object message)
at CallSite.Target(Closure , CallSite , ResponseManager , Session , Object )
at Wisej.Core.ResponseManager.ProcessRequest(ServiceType service, Object message)
2021-06-12 10:21:46,383 ERROR Program on_ThreadException – System.ApplicationException: Unknown function: updateRows
at Wisej.Web.Application.ProcessCallbackWebEvent(WisejEventArgs e)
at Wisej.Web.Application.ProcessWebEvent(WisejEventArgs e)
at Wisej.Web.Application.OnWebEvent(WisejEventArgs e)
at Wisej.Web.Application.Wisej.Core.IWisejComponent.Event(WisejEventArgs e)
at Wisej.Core.ComponentManager.DispatchEvents(Session session, ICollection events)
at CallSite.Target(Closure , CallSite , ComponentManager , Session , Object )
at Wisej.Core.ResponseManager.<>c__DisplayClass25_0.<OnEvent>b__0()
at Wisej.Core.IWisejSynchronizedImplementation.Lock(IWisejSynchronized target, Action action)
at Wisej.Core.ResponseManager.OnEvent(Session session, Object message)
at CallSite.Target(Closure , CallSite , ResponseManager , Session , Object )
at Wisej.Core.ResponseManager.ProcessRequest(ServiceType service, Object message)