Object reference not set in level 3 assignment 1

this error comes while assingning transactiondata.select(“Type=‘WI5’ AND Status =‘Open’”)
Wilist type is datarow
Transaction data type is datatable

It simply states that you are getting null values in that activity. Please check if you are passing correct filters or the variables correctly

I checked.the condition and the variables are mentioned correctly.bt i don’t know why this error repeats

Check if the value is not null by placing the same in write cell and check if it is returning null or the value so that you can confirm you are getting the value correctly @Venkatraman