Error "Missing Sub Definition or missing GoSub definition"

[c-conversion]

This is more a note to other users and to myself as a reminder.

I had need to compile a program written about five years ago. This program was previously working without any noticeable issues. Today on compilation I got the error reported:

Program.gcb (1172): Error: Missing Sub definition, or, missing GoSub definition

Which pointed to this sub, specifically the 'End Sub' line:

Sub ShowNameMessage
    Check_Switches
    If SwitchValue = SwUP Then
        Get_The_Values
        Print "Bon:    Gsw:    " 'Show the values
        Locate 0, 4
        Print (Acc_T_Value)
        Locate 0, 12
        Print (GSWin)
        Return
    End If

    '      0123456789012345
    Print " Super  Lottery " 'Show the splash screen
End Sub

Scratched my head for a while decoding this error and then decided to comment out the 'End Sub' line.
The error then pointed to:

      Return

I changed this to

      Exit Sub

Then reinstated the 'End Sub'.

This sub then compiled, but I had used 'Return' in another sub in the same way, preventing compilation at that point too.

Changing the 'Return' there as well allowed the program to compile.

I guess that at some point the compiler has been changed to not allow 'Return' to exit from a Subroutine, only to return from a GoSub.

Confused me for a while though...

[Anobium]

Your observations are correct.

I tightened up the syntax EXIT SUB is now, correctly, associated with SUB.

This change permits the syntax checking part of the compiler to ensure the source program are correctly structured.