I am trying to pass on a variable called by a subroutine in a macro written
in a different workbook. The variable is the filename of the workbook where
the first macro is written. I didn't get an error with both of the following
lines of code, but it just stopped running. Can you help?

FirstWb = ThisWorkbook.Name
ActiveWbMacro = SecondWb &* "!RunMacro2(""" & FirstWb & """)"
Application.Run ActiveWbMacro

I also tried:
ActiveWbMacro = "'" & SecondWb &* "'!RunMacro2(""" & FirstWb & """)"
Application.Run (ActiveWbMacro)

Thanks for your help!