Ah, it does look like that field is smaller in PFRPG2 than other rulesets. Thanks for bringing that to my attention!
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One thing I found is that in Pathfinder 2e it creates an infinite loop in the PC Items Total Value section. Would it be possible for P2E to not have their coins calculate to a price, or move that to a different slot?
Coins Loop
Attachment 57526
After deleting price
Attachment 57527
As soon as the treasure is updated the price updates and the GP goes back to 000000.
It does not have a separate total coin value but it is included in the total inventory value.
Edit:
Never mind I am wrong on that. I just created a new campaign file to test it. Without coin weight the Treasure coins do not get added to the PC Item Total Value. But with Coin Weight it breaks the GP field.
Huh... Maybe there is a conflict somewhere? In the new campaign file, it started out with the same issue. I then exported the character and the numbers normalized Attachment 57541 however, it did not do so until after I exported my character. And it is now properly working for the new campaign.
To break test, it I disabled all but your extension. Here is what I found, some combinations of numbers work. Attachment 57542
But if a field is empty, it breaksAttachment 57543
And also if you do not adjust your treasure properly in the GP field it also breaks
Attachment 57544
Attachment 57545
Attachment 57546
Edit.
Looking at the "Works.png" it doesn't actually work. It should only be 3 PP not 33 PP
I'm currently running FG v4.4.9 with the 3.5e ruleset. It seems this Coin Weight extension is pulling in the the currency value and weight incorrectly.
In the options of FG for currency there is a table with 3 columns (currency, Wt, and Value). Changing these I see that the extension is only pulling from the Wt column.
Is there a way to fix this? I also can't seem to find the .xml file in my FG extension folder.