Walkthrough – Calculate Client Security Hash page 10-11

Kind time of the day, I have a problem, here it is:
System error at initialization: Object reference not set to an instance of an object. at Source: Anonymously Hosted DynamicMethods Assembly

And I even know where she might be, but I do not know what to do, I want to hear your opinion.

In general, I think that when I get the value in the WiList as a result of the selection, I have to send it to GetTransactionData, since later in the GetTransactionData I use just this variable, am I right?

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In the variable panel for ExtractDataTable variable set default to New.System.Data.DataTable

Tell me if that works for you :slight_smile:

I do not understand what needs to be fixed there?
in_Ectract_DT takes a value from the form where the data is scraped or do you mean that in_Ectract_DT needs to be passed to the GetTransactionData form?

Hi @andrey-mironov-96,

The workflow from which you are scrapping the data as datatable that variable needs to be initialized


After this you will filter WI5 items from this datatable and send WIList filtered items as IN argument to getTransactionData


that is, after “Assign” it will be necessary to send the WIList in the “Invoke workflow file” component, or then use the “Invoke workflow file” on the form “GetTransactionData”
I’m something this moment does not understand

See this

Did everything exactly as you said, the error remained, I understood the reason for the error, but I do not understand how to fix it, here are my screenshots, I’m even embarrassed because of this.

Hi… I was comparing yours screenshot with my assignment… I notice that my in_WIList is a datatable not a datarow…
If I remember correctly WIList is result datatable after extract and filter all work items… So its a datable not datarow…

And try importing and edit all invoke workflows, maybe you have forgotten one… I always make that mistake.