Error changing a block constant from a number to a letter for analyzing in an equation

Hi, I am trying to do something very simple, just change a variable from a number to a letter for integration. It gives me an error like the following:

This is what I have set it up as:

Answer 1

[Siriniharika Katukam]

Hi,

I understand that you are trying to access a variable that is not defined in any of the workspaces. You can make the variable available to the constant block by just declaring it in the base workspace. You can fix it from the error dialog box.