4D Doc Center : Method called on error

4D v13.4

Method called on error


Method called on error -> Function result

Parameter	Type	Description
Function result	String	Name of method called on error

Description

The Method called on error command returns the name of the method installed by the ON ERR CALL command for the current process.

If no such method has been installed, an empty string ("") is returned.

Example

This command is particularly useful in the context of components because it enables you to temporarily change and then restore the error-catching methods:

 $methCurrent:=Method called on error

 ON ERR CALL("NewMethod")

  ` If the document cannot be opened, an error is generated

 $ref:=Open document("MyDocument")

  ` Reinstallation of previous method

 ON ERR CALL($methCurrent)