Delphi Error – E2107 Operand size mismatch

Delphi 66 Views 1 Min Read

Delphi Compiler Error

E2107 Operand size mismatch

Reason for the Error & Solution

The size required by the instruction operand does not match the size given. 

program Produce;

  var
    v : Integer;

  procedure Assembly;
  asm
    db offset v
  end;

begin
end.

In the sample above, the compiler will complain because the ‘offset’ operator produces a ‘dword’, but the operator is expecting a ‘byte’. 

program Solve;

  var
    v : Integer;

  procedure Assembly;
  asm
    dd offset v
  end;

begin
end.

The solution, for this example, is to change the operator to receive a ‘dword’. In the general case, you will need to closely examine your code and ensure that the operator and operand sizes match.

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