You were attempting to call a regular method by simply providing the class type, rather than an actual instance. Normal methods and destructors are not allowed, only class methods and constructors. The example attempts to destroy the type TMyClass, which is illogical and so unlawful. As you can see, we intended to destroy the type’s instance rather than the type itself.

When an expression is used as a condition, it must be of the Boolean type to produce this error message. This is true for the if, while, and repeat statements’ controlling expressions, as well as the expression that controls a conditional breakpoint. A pointer variable was used as the condition of an if statement in this case by a C++ writer. In this scenario, you…

This error message is issued when an identifier given in the parameter list to New is not a constructor. By mistake, we called New with the destructor, not the constructor. Ensure that the New standard function has a constructor, otherwise it will not work.

At this point, the compiler demanded an ordinal type. The predefined types Integer, Char, WideChar, Boolean, and specified enumerated kinds are known as ordinal types. Ordinal types are needed in a variety of situations: An array’s index type must be ordinal. The low and high bounds of a subrange type must be ordinal type constant expressions. An ordinal type must be the element type of…

This error message appears in your delphi program when the declaration of a procedure, function, method, function Object() { [native code] }, or destructor differs from its previous (forward) declaration. This error message also appears when you attempt to override a virtual method, but the overriding method has a different parameter list, calling convention, and so on. As you can see, there are several possible…

This error occurs when you try to write a type that isn’t permitted in a Write or Writeln statement in your delphi program. It would have been easier to use a writeln statement to output Color, wouldn’t it? Unfortunately, that is not legal, and we have to do it with an auxiliary table.

The compiler was unable to locate the specified identifier; it was most likely misspelt at the time of declaration or use. It could be from a different unit that doesn’t have a uses clause. The variable was declared as “Counter” but was used as “Count” in the example. Either update the declaration or the places where the variable is utilised as a solution. We changed…

When you try to change a read-only object like a constant, a constant argument, the return value of a function, read-only properties, or fields of read-only properties in your delphi program, you’ll see this error message. You can tackle this problem in one of two ways: So that the assignment is legal, change the definition of whatever you’re assigning to.Remove the task entirely from the…

When there are many case labels in your delphi program with the same value in a case statement, this error notice appears. We didn’t pay attention here, and the case label 0 was specified twice. How to fix it? When you have symbolic constants and ranges of case labels, the problem may not be obvious; you may need to write down the true values of…

When a call to a procedure or function in your delphi program returns fewer parameters than those indicated in the procedure or function declaration, this error message appears. Calls to standard procedures or functions can also cause this. The procedure Val provides one more parameter in which to return an error code. That parameter was not included in the example. Typically, you will compare the…

The compiler discovered an illegal character in Delphi program. Errors with string constants or comments are the most common cause of this error message. In this case, a programmer reverted to C++ conventions and quoted a string with double quotes. The solution is to use single quotation marks. In general, you should remove the illegal character.