Limit position number template error

Hello.

Im trying to create a template that allow me to create strategies with only once position at time, but I´m getting an “magic numer” error when I try to build

00:05:07 Build Market : GRID: Stopping build, job failures (exceptions) exceeded 70%! 00:05:07 Build Market : Strategy 1.0.14 – Exception in backtest: For input string: “MagicNumber” – in 0.01 s. 00:05:07 Build Market : Strategy 1.0.7 – Exception in backtest: For input string: “MagicNumber” – in 0.01 s. 00:05:07 Build Market : Strategy 1.0.4

I have fixed your template. Find it attached