Comments by Member 13710355 (Top 4 by date)

First of all thank you for the advice but if you don't mind could you please elaborate on what you mean by " Open the file at the very beginning of your program then you can write to it any time" ?

Thank you @Richard MacCutchan for replying and the solution you have given me, but for some reason the same error is appearing for all of line numbers mentioned in my question above.

I'm not sure how to define the variables for error, ID, ProductName, Price and Stock.

@Richard MacCutchan, what do you mean by that the other statements are just invalid statements ? Also how would you define the variable error ?