Forum > TIWTreeView fail on Clear

05-24-2024, 05:12 PM:

Hi,

I'm experincing problems with TIWTreeView that persist even in v15.6.1

The problem typically is that the ClearAll method drives to frequent exceptions of this type:

[2024-05-24, 13:14:41.563] TreeView Before Call [TIWTreeView].ClearAll - Items Count: 450

[2024-05-24, 13:14:41.580] TreeView ERROR After Call [TIWTreeView].ClearAll - Invalid pointer operation

[2024-05-24, 13:14:41.789] Access violation at address 0000000000CE4106 in module 'HSCCSManagerWeb.exe'. Read of address 0000000000000000

It event is generated if I perfom this sort of individual cleaning:

tvSTtransactions.Items.BeginUpdate;

for var i := tvSTtransactions.Items.Count - 1 downto 0 do

begin

tvSTtransactions.Items.Delete(i);

end;

tvSTtransactions.Items.EndUpdate;

No extra information is retrieved from those exceptions. Has anybody solved it in a different form?

@Alexandre Machado, could you please check what can be buggy on the sources of the component?

Thanks in advance. Regards, Pablo.

02-05-2025, 12:24 PM:

@Alexandre Machado, had you any chance to check the TIWTreeView?

Many thanks in advance.

03-03-2025, 09:04 AM:

Seems that you are using x64 bit, is that correct?

I'll try o recreate it here and let you know.