Runtime error in class based transaction creation

Hi experts,

I have created a global class which has a method in it. Now I want to go to se93 and create a class based transaction for my global class. However, on creating the transaction and executing it, I am getting a runtime error stating "A mandatory parameter was not populated when dyn. calling a method".  Please tell me the cause of this error and how I should rectify it. I have attached the screen shots for your reference.

Regards.

Manish.

Below is my class with method get_data having the following 3 parameters.

I created a transaction in se93 .

I am getting the following runtime error.

I have also attached the code for my method .