Q66497: C and c Are Illegal Symbols in MASM 5.10 and 5.10a

Article: Q66497
Product(s): See article
Version(s): 5.10 5.10a | 5.10 5.10a
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | | mspl13_masm
Last Modified: 12-NOV-1990

If you assemble the code below with the Microsoft Macro Assembler
version 5.10 or 5.10a, the following error is generated:

   error A2009: Symbol not defined:

This error occurs because "c" or "C" can be used in your .MODEL
statement to identify that you are doing mixed-language programming
with C. This process makes C a reserved symbol, and therefore it
cannot be used in your program.

This behavior is by design and is not considered a problem with the
Microsoft Macro Assembler.

Code Example
------------

public c

c PROC FAR
c ENDP

end

Workaround
----------

Change "c" or "C" to something else.

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