HomeDelphiDelphi Error – E2512 Type parameter ‘%s’ must be a non-nullable value type

Delphi Error – E2512 Type parameter ‘%s’ must be a non-nullable value type

Delphi Compiler Error

E2512 Type parameter ‘%s’ must be a non-nullable value type

Reason for the Error & Solution

This occurs when using a nullable type inside a generic object type parameter.

program E2512;


{$APPTYPE CONSOLE}

uses
  SysUtils;

type
  TSimpleTypeGenericType<T: record> = record
  end;
  TMyClass = class

  end;
var
  MyObj: TSimpleTypeGenericType<TMyClass> ; //E2512
begin

end.

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