Thanks for the tip; I was also having problems with this extension not working, and this actually fixed it :)
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@Shoestring glad you found a solution.
@MrDDT I"ll maybe get a chance tonight to look into this.
Cheers, Steve.
I've hashed out a fix (I think) for the doubling of auras. Just waiting for @Bmos to answer a question to be sure I've surmised correctly on how the aura ext works.
Once he's replied and I'm sure my fix works then I'll post it up.
@MrDDT I'm assuming it's the 'FROMAURA' that is getting doubled up when damage is undone on the target?
Cheers, Steve.
Just pushed a new build (1.2)
This should take care of the double aura issue found by @MrDDT.
Cheers, Steve.
Thank you for the update, working great.
Glad it's fixed, now stop breaking my stuff ^^
Cheers, Steve.
Since the patch that added the sparkle dice whenever I try to use it it just says nothing to undo , is there any troubleshooting I can post to help you track this down.
Hi smokebadger, I'm not seeing this happening at all.
Can you let me know what other extensions you're running as a possible conflict could be theae cause of the problem.
Cheers, Steve.
I to was getting it, but we've finished that campaign and haven't checked again
Just pushed a fix for this so it now hopefully works alongside the Combat Automation extension.
Cheers, Steve.
New QoL update to the undo extension, all connected clients are now notified when the GM uses undo.
Cheers, Steve.
With the recent update to the Aura effects extension, this extension and that one don't play nicely together at the moment.
I'll maybe get chance to look into it this weekend and hopefully come up with a fix.
Cheers, Steve.
Love the extension!
Just realized that it doesn't seem to work with hstealtemp as a damage type (gain temp hp equal to half the damage done) from the Constitutional Amendments Extension.
I get the "Undo Completed" message, but neither the damage nor the temp hp gain is reversed.
I would guess there is the same issue with the other similar damage types from CA, but haven't had time to check.
This doesn't come up terribly often, so it's not a huge deal, but I did want to report it in case you deem it worth pursuing compatibility.
Thanks!
Thanks for the heads up.
I'll add it to the list to look at when i get chance :)
Cheers, Steve.
Is this still supported? It appears the update was over 300 days ago.
I get the message "There is nothing to undo." I find this extension useful and I hope it is looked into.
Still working ok for me.
You'll have to elaborate a little on how/why it's not working for you.
Cheers, Steve.
Attachment 60757
I right click the NPC in the CT and I get the message Nothing to Undo when I click Undo. I'm sure it is a conflict with an Extension and I will see about checking into that at some point.
It looks like this is another extension causing the undo ext not to work. I've just tested with a fresh campaign and only the undo extension loaded and it works fine.
If you get a chance could you list what extensions you're currnetly running?
Cheers, Steve.
This extension works wonders on damage and healing... any chance of having it work for "Recovery" rolls as well (spending Hit Dice to heal)?
One other thing I noticed (not expecting you to do anything about it, but want to mention it):
If using "(E)" on an effect for Better Combat Effects Gold (If the source of the effect drops to zero hit points, this effect will be removed). The effect doesn't get added back if the damage that dropped the actor to zero is 'undone'.
I'll take a look when I get chance, but promise nothing :P
Work has me 'back at school' atm so lots of studying and not much 'me time' :S
Cheers, Steve.
Hi,
Thank you for this great extension — I use it in every session and it’s been incredibly helpful.
I’ve noticed one issue: when performing an undo action, the system reveals the actual creature name in the chat, even if that creature is unidentified to the players.
I’m using the FG D&D 5E ruleset.
For example, a Rakshasa disguised as a Hook Horror (via Disguise Self) was fighting the party. The players were unaware of its true identity. After a misapplied damage, I used the undo function, and the chat displayed:
"Undo completed on Rakshasa"
That unfortunately spoiled the twist for the players.
Feature suggestions:
- Can the undo message use the name from the combat tracker instead of the actual creature name?
- Could you add an option in the FG settings to control whether the undo message is shown to players or only to the GM?
Thanks again for your work on this extension!
Not a bad shout at all. I'll put it on the todo list :)
Cheers, Steve.
Just pushed a new build with the changes requested by @morfil.
Undo on NPC's now respects the the identified/unidentified name
New setting in the combat optons tab to notify all players or just Dm of an undo having been completed.
https://www.fantasygrounds.com/forum...BJRU5ErkJggg==
Cheers, Steve.
One more minor thing (not expecting action, but add it to the list!):
Damage dealt with the "RETURNDMG: [dice] [type]" effect from the Automatic Return Damage extension doesn't seem to be able to be undone with your extension.
On TEST:
When you roll any damage:
[3/18/2026 7:14:41 AM] [ERROR] Handler error: [string "5e Undo:scripts/undodamage.lua"]:60: attempt to call global 'oldonDamage' (a nil value)
Passing it along
Just visiting to say Good Luck and Ease on your work! :)
Thank you for all the free extensions and especially for Undo. I make TONS of mistakes and this one saved many-a PCs lives. xD
Getting this error when knocking someone to 0 hp in the Test channel for the next FG release.
[ERROR] Handler error: [string "5e Undo/scripts/undodamage.lua"]:102: bad argument #1 to 'match' (string expected, got nil)
Hi @bwatford,
Just had a quick look at this on the test channel and I'm not seeing this error.
Can you try with only my undo ext loaded and test again? It may be another extension conflicting.
Cheers,
Stv.
Can confirm, the error does not happen in isolation.
So now I need to find the conflict.
Got this error after the big update with only this extension loaded and nothing else.
[ERROR] Script execution error: [string "5e Undo:scripts/undodamage.lua"]:22: attempt to index global 'ActionHeal' (a nil value)
Also got the same exact error on the extension
Had an updated version waiting ready to go once this update dropped.
If you check for updates, this one should be working again.
Cheers,
Stv.