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Product: PowerShell Studio 2021 (64 Bit)
Build: v5.8.192
OS: Windows 10 Enterprise (64 Bit)
Build: v10.0.18363.0

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I am using a TableLayoutPanel to organize some text boxes. After moving/adding some textboxes in the TableLayoutPanel with a Copy/Paste, CTRL-Z, and CTRL-Y, errors are produced. The error(s) can prevent closure of PowerShell Studio (except with end task) which may end up causing data loss. I think it might just a problem with 'Undo' and 'Redo' overall. I reverted to 191 and had error messages when dealing with other controls and undo/redo.

Reproduce:
New Form
Add TableLayoutPanel
Add a Textbox
Copy/paste Textbox several times in the TableLayoutPanel
CTRL-Z a couple times
CTRL-Y a couple of times
May have to repeat the undo/redo to produce the errors

Errors:
Unhandeled Exception: Cannot access a disposed object.
Cannot remove the specified item because it was not found in the specified Collection.
Non-negative number required.
Parameter name: count

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Thank you for reporting. I have been able to reproduce this behavior and have filed a bug report with the development team. I'll post here when I have an update.

Please try service build 5.8.193 and let me know if this is still an issue for you.

brittneyr wrote: ↑Thu Aug 26, 2021 7:19 am Please try service build 5.8.193 and let me know if this is still an issue for you.

Working well now - Thank you for the quick turn-around!