Error with C# Code

[PapyRef]

I tested interface between a Zenno variable and C# code.
I got this error when i tested C# code. Can you explain me why ?

 

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I tested interface between a Zenno variable and C# code.
I got this error when i tested C# code. Can you explain me why ?

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In test mode of code you can't get access to yours variables from current project. In test mode you should add to list name and value of variable and test code will be use variables from this list (not from your project). Also in test you can't use lists and tabels.
When you are testing your code you haven't variable "text" and variable "yourText" is null or empty string. Then method "Substring" is called, your code is throwing exception. Because substring from this range can not be got.

In action, you can't use code like this "var yourText = {-Variable.text-};" for getting variable's value. You should use variable "project" like you have done it in test form.