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Question - IDE Breakpoint not appearing

I have GM and toggling breakpoints in 'executable code' does nothing, breakpoints will not appear.

I have tried both right clicking and selecting 'toggle breakpoint' and using the shortcut 'F9' nothing happens.

is anyone else experiencing this?

Update: I have just realised that it appears the entire code block gets a breakpoint (a red frame appears around it). But thats not very useful! can you not breakpoint an individual line?

Update 2: ok so i believe the only way to add breakpoints to a specific line is to breakpoint the code block then you can add line breakpoints once it breaks on the block! Not the most convenient solution!
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For me it's adding breakpoint on exactly that line on which I'm adding it - are you maybe using DnD project not GML ?