Validation RULE in widget

I am trying to make a validation rule of a comando button widget in an entity screen to work…

so far I have had no luck…

this is suppossed to enable button when the owrk period is cosed… bu it disables it all time…

what am I doing wrong?

Thanks

G.

Are you sure if the value is set to FALSE not False or 0?

@gerlandog try '{:ISCURRENTWORKPERIODOPEN}' is 'FALSE'

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