Error in assignment2 assignment to level3

In workitem, a number button below is not clicked. If: Object reference not set to an instance of an object. How do I fix a bug? (819.5 KB)


This error usually occurs when you are trying to assign any Null value.

I guess TransactionItem doesn’t hold any value here and because of that it’s giving error.

If you want to check for Null value try like this.

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