I am trying to complete the assignment 1 of level 3 but here is the problem I am stuck with the error : System error at initialization: Object reference not set to an instance of an object. at Source: Anonymously Hosted DynamicMethods Assembly.
Your datatable ‘dt_WIs’ seems to be not having any data that is why dt_WIs.Rows.Count.ToString in the Log message activity is throwing error.
Initialize the datatable before using and your issue will be resolved.
You can do the same using Assign activity as shown below.
dt_WIs = new DataTable