Procedures With Arguments Require a Specified Language

• Microsoft Macro Assembler for MS-DOS, versions 5.0, 5.1, 5.1a, 6.0, 6.0a and 6.0b
• Microsoft Macro Assembler for OS/2, versions 5.1, 5.1a, 6.0, 6.0a, and 6.0b

SUMMARY

A program which uses the .MODEL directive and has a procedure which receives arguments, will not assemble correctly if a language is not specified. Under Microsoft Macro Assembler (MASM) versions 5.0, 5.1, and 5.1a, the language is specified with the .MODEL directive and the following errors will be produced the language is omitted:

   A2022: Operand must be type specifier
   A2009: Symbol not defined: 'symbol'

   A2119: language type must be specified
   A2006: undefined symbol: 'symbol'

MORE INFORMATION

The language parameter on the .MODEL directive enables the PROC extensions, changes the scope of code labels within procedures, and may affect naming. When the language parameter is left off, the PROC directive will only accept a NEAR or FAR specifier.

The following sample program illustrates the situation:

Sample Code

;Assemble options needed: none

        .model small
;       .model small, c             ; This line will permit assembly.

        .code

myadd   PROC arg1:word, arg2:word

        LES bx, arg1
        LES dx, arg2

        RET
myadd   ENDP

        END