Calling LoadTasksFromJSONFile (or stream) generates access violation message

FNC TMS FNC Gantt Chart
1

Hello,
I have installed TMS FNC Core v4.2.2.7 and TMS FNC Gantt Chart v.1.3.3 in Delphi 13.
When I call the LoadTasksFromJSONFile or LoadTasksFromJSONStream function in my own project or in the sample project provided ("...\ TMS FNC Gantt Chart\Demos\Fill Project"), I always get a protection violation. Saving with SaveTasksToJSONFile or SaveTasksToJSONStream works perfectly (load/save with csv also). It seems to be related to FOwnerProject, which is nil:

function TTMSFNCGanttTask.GetPlannedDuration: TTMSFNCGanttDuration;
begin
  if (SubTasks.Count > 0) and CheckProjectAutoParentStartEnd then
  begin
    FOwnerProject.WorkTime.GetDurationBetweenDateTimes(ScheduledStart, ScheduledEnd, FPlannedDuration, WorkTimePolicy, False);
  end;

  Result := FPlannedDuration
end;

Screenshot 2026-02-26 155348
Screenshot 2026-02-26 155348813×513 24 KB

Is there a solution for this? I appreciate any help.

2

Hello,

Thank you for the information.
We are currently investigating the cause of the problem.

3

This will be fixed in the next release of TMS FNC Gantt Chart.

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