---
name: "ReqErr"
section: "3"
platform: "linux"
package: "ivtools-dev"
version: "1.1.3-4"
release: "Debian 3.1 (Sarge)"
platforms: ["linux"]
url: "https://new.carta.tech/ReqErr"
---

# ReqErr(3)

handle request errors

## NAME

ReqErr - handle request errors

## SYNOPSIS

**#include \<InterViews/reqerr.h\>**

## DESCRIPTION

Some requests to the window server may generate an error. For example, if a window is destroyed while it is being repositioned interactively, the request to place the window in the new position will fail. Normally, errors cause a process to terminate. The ReqErr class is used to handle errors within an application. The base class defines the attributes associated with each error, including a *message* string describing the error, an integer *request* code that specifies the kind of call that generated the error, and a *id* object that was the target of the request. When an error occurs, the attributes of the current request handler are assigned and the handler's Error operation is called.

## PUBLIC OPERATIONS

- **ReqErr\* Install()**

  Use this error handler for subsequent errors and return the previous error handler.

- **virtual void Error()**

  Handle a detected error. The default handler is a nop.

## SEE ALSO

Interactor(3I)