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Q27482: "String Space Corrupt" Within Editor but Not in .EXE File

Article: Q27482
Product(s): See article
Version(s): 4.00 4.00b
Operating System(s): MS-DOS
Keyword(s): ENDUSER | B_BasicCom buglist4.00 buglist4.00b fixlist4.50 | mspl13_basic
Last Modified: 17-JAN-1990

The following program gives a "String Space Corrupt" error inside the
QB.EXE editor when it is executed a second time. However, if the
second to the last line is deleted, the program executes without
causing the error.

If various other lines are removed, the program will also run without
giving the error message.

The program executes correctly if compiled and run as an executable
file.

Microsoft has confirmed this to be a problem in QB.EXE in QuickBASIC
Versions 4.00 and 4.00b, and in QB.EXE in Microsoft BASIC Compiler
Versions 6.00 and 6.00b for MS-DOS (buglist6.00, buglist6.00b). This
problem was corrected in QB.EXE in QuickBASIC Version 4.50 and in
QBX.EXE in Microsoft BASIC Professional Development System (PDS)
Version 7.00 (fixlist7.00).

As a workaround, compile and run the program as an executable file.

The following is a code example:

DEFINT A-Z
INFI = 4: PARTIAL = 0
P = 27
OPEN "R", INFI, "LETHDR62", 220
FIELD INFI, 220 AS FLD$
BYTUSE = 4095
FOR i = 1 TO 3
    J = 220 - P + 1
    IF J > BYTUSE THEN J = BYTUSE
    FIELD INFI, P - 1 AS D$, J AS D1$
    BYTUSE = BYTUSE - J: P = P + J
    IF P > 220 THEN P = 1
NEXT
PRINT "Hello, the next statement fails on the second pass through"
D$ = CHR$(6)
CLOSE INFI

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