An Object reference is not set to an instance of an object

[kaavya (Mamtha)]

hi!
here, I am trying to add ExpenseMonth current rows to months by using activity called add to collection and this is from academy exercise, I have checked with it and everything seems right but I don know, why am I getting “an object reference is not set to an instance of an object”

so, any help could be appreciated
thanks.

[Srini84 (Srinivas Kadamati)]

@kaavya

Object reference not set error appears if you are passing a null value
Share me the process folder and which exercise are you referring to

Thanks

[kaavya (Mamtha)]

shared below. kindly, check it out.
calculating monthly percentage of each expenses.zip (17.2 KB)

[Sugumar8785 (Sugumar Ramachandran)]

The list variable Months is not having any values. When you add values into the list variable before you use, you will not face this issue.

[kaavya (Mamtha)]

thank you,
but i got another error in the same file and the error is Assign: Input string was not in a correct format .