It might seem very basic but what does ~LIT~() mean and how would you use it ?
Literal. So just a direct numeric or text value, not a variable or property or another indirect/referenced value. You put the desired value between the brackets/parentheses.
LIT means Literal.
Value of the Variable is denoted like that. Here it means that the Value of PackNum is LITERAL(NULL). That's NULL.
Thank you so much!