Article: Q40890
Product(s): See article
Version(s): 4.00 4.00b 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | SR# S890123-207 B_BasicCom | mspl13_basic
Last Modified: 14-DEC-1989
If a BASIC SUBprogram name contains a period (that is, a dot), then
any variables that have the same name as the portion of the SUBprogram
name that is left of the period produce a "Variable name not unique"
error message from BC.EXE at compile time. The program does not
produce the error inside the QB.EXE editor environment.
This information applies to Microsoft QuickBASIC Versions 4.00, 4.00b,
and 4.50 and Microsoft BASIC Compiler Versions 6.00 and 6.00b for
MS-DOS and MS OS/2.
This behavior does not occur in Microsoft BASIC PDS Version 7.00.
BASIC PDS Version 7.00 will successfully compile a program under the
above conditions.
The sample program below runs inside the QuickBASIC environment.
However, when compiled using BC.EXE, a "Variable name not unique"
error message is produced.
It is recommended that variable and subprogram/function names contain
no periods. Periods are now used by BASIC in specifying individual
elements of a user-defined type variable. To eliminate the problem in
the program below, remove the period from the SUBprogram name.
The following is a code example:
DECLARE SUB Test.one ()
COMMON SHARED Test AS SINGLE
Test = 4
CALL Test.one
END
SUB Test.one
PRINT "in Test.one"
END SUB