Okay so I was writing my banking system and it's pretty much done, but I've ran into one problem. My bank has two things: the ability to deposit or withdraw and to buy bonds. The deposit and withdraw part works, however when I try to set up a bond an use it I keep getting errors. I've tried everything I know, so I'm going to take a breather and hopfully someone else can figure out the issue.
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The error appears when you click on "Purchase Bond" in the command window.