With this update is possible transfer balance?

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[macro]0 {SayBankBalance} Balance:=Self.Balance() Self.Say(!balance!)[/macro]

Because implemented variable starts with capital letter B, and in self.say there is small b

just change it to [macro]0 {SayBankBalance} Balance:=Self.Balance() Self.Say(!Balance!)[/macro]

And remember you have check your balance first