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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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     Error: A2020
     Operand must be segment or group
 
     A segment or group name was expected, but some other kind of
     operand was given. For instance, the ASSUME directive requires
     that the symbol assigned to a segment register be a segment name,
     a group name, a SEG expression, or a text equate representing a
     segment or group name. Thus, the following statement is accepted:
 
                 ASSUME  ds:SEG variable  ; Legal
 
     However, if the same statement is assigned to an equate, it is
     not accepted, as shown below:
 
     segvar      EQU     SEG variable
                 ASSUME  ds:segvar        ; Illegal
                                    -♦-