Q37900: Do Not LINK Multiple Modules with /PACKCODE

Article: Q37900
Product(s): See article
Version(s): 4.00 4.00b 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | B_BasicCom | mspl13_basic
Last Modified: 16-NOV-1988

When developing large programs in QuickBASIC that require multiple
modules, do not LINK with the /PACKCODE option. This can stop the
program with the following run-time error on a RESUME NEXT statement
(when ON ERROR GOTO is used):

   No line number in module <name> at address: <address:offset>
   Hit any key to return to system

Linking with /PACKCODE may not produce any run-time errors in a
single-module program.

This information applies to Microsoft QuickBASIC Versions 4.00, 4.00b,
and 4.50, and the Microsoft BASIC Compiler Versions 6.00 and 6.00b for
MS-DOS and MS OS/2.

For more information about the /PACKCODE switch, please see the
section on "Linking object files with LINK" in the "Microsoft CodeView
and Utilities" manual provided with the BASIC Compiler Versions 6.00
and 6.00b (or with the Microsoft Macro Assembler Versions 5.x).

The following is a code example:

'<====== Main Module ======>
DECLARE SUB testsub ()
CALL testsub
END

'<====== SUB Module, Separately compiled  ======>
ErrTrap:
   PRINT " Error : ", ERR, " trapped in SUB module"
   PRINT
   RESUME NEXT
   END
SUB testsub STATIC
    ON ERROR GOTO ErrTrap
    ERROR 61
    PRINT "Returned from error routine"
END SUB