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Q33621: "RETURN without GOSUB" When ON ERROR and CHAIN in 4.00b

Article: Q33621
Product(s): See article
Version(s): 4.00b 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | buglist4.00b buglist4.50 | mspl13_basic
Last Modified: 8-DEC-1989

If the following program is compiled in QuickBASIC Version 4.00b or
4.50 or Microsoft BASIC Compiler Version 6.00 or 6.00b and CHAINed
to/from another program, the error message "RETURN without GOSUB in
line 10 of module" is generated. This problem does not occur when
executed inside the QuickBASIC environment or if the two programs are
compiled with the same switches or if A.BAS is compiled with /O
switch.

Microsoft has confirmed this to be a problem in QuickBASIC Versions
4.00b and 4.50 and in Microsoft BASIC Compiler for MS-DOS and OS/2
(buglist6.00, buglist6.00b). This problem has been corrected in
Microsoft BASIC Compiler Version 7.00 (fixlist7.00).

The following is a code example:

   ' A.BAS, the CHAINing program:
   CHAIN "B"

   ' B.BAS, the CHAINed-to program:
   ' Will give error message unless A.BAS was compiled with /E or /X.
   GOSUB sub1
   PRINT "It works!"
   END
   sub1:
         PRINT "Here I am!"
         ON 1 GOSUB sub2
         PRINT "I'm back!"
   10    RETURN                  'Says RETURN without GOSUB here when
                                 'compiled.
   sub2:
         PRINT "I'm down here!"
         RETURN
   sub3: ON ERROR GOTO OhNo      'Should never get to this line.
   OhNo: END                     'Never gets to this line.

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