[Overview][Constants][Types][Classes][Procedures and functions][Variables] | Reference for unit 'Classes' (#fcl)

# EInvalidOperation

[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

Exception raised when an invalid operation is performed. Obsolete.

## Declaration

`type EInvalidOperation = class(Exception) end;`

## Inheritance

`EInvalidOperation` |  | Exception raised when an invalid operation is performed. Obsolete.
`Exception`
?
`TObject`

## Description

This exception is not used in Free Pascal, it is defined for Delphi compatibiliy purposes only.