I keep getting the error “Argument is not optional” when running the following

REM  *****  BASIC  *****
Sub Main
    Call nRight(5)
End Sub
Sub nRight(n as Integer)
    print "n = ",n
End Sub
What am I doing wrong?
Thanks
          
You will get that error if your insertion point is within Sub nRight when you run the macro.
To avoid the error, position your insertion point within Sub Main before you run the macro, e.g. by clicking within the line ‘Call nRight(5)’.