@fr0121 It's not clear, if you mean that you can't change resources as variables through the interface while being in the script logic, then it should be like that
There is A Bug With Subtract Date
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Using Windows 10 on Latest Bablosoft Version 24.2.2
Subtract date issue when using different Dates See Screenshot/XML file

Date Time Bugs.xml -
I have the same problem with "Subtract Dates" action.