Error in strategy tester

[B9dz]

Hello, when I compiled the project on the web to .mq4 there was no problem, I put it in metatrader 4 and when I used the strategy tester when starting directly I got this error;

I have gone to the line of code and the error is here;

Why is this happening? Thanks a lot!

[roar]

@B9dz well the LotStep variable has a value of 0, for some reason

[B9dz]

@roar Is there any way to fix it? I have gone to where the variables are and only this appears. Thank you!