4D v13

PV ON ERROR

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4D View v13
4D View Language
PV Area
PV ON ERROR

PV ON ERROR 


 

PV ON ERROR ( method ) 
Parameter Type   Description
method  String in 4D View method

The PV ON ERROR command installs the method to manage 4D View errors.

This interruption method is executed every time an error occurs during a 4D View command call, thereby allowing control of eventual execution errors.

The called method receives 3 parameters:

$1 : 4D View area reference
$2 : Error number
$3 : Error text

The numbers and the labels of errors generated by 4D View are provided in Appendix A, List of 4D View error codes.

To uninstall method, simply call the PV ON ERROR command with an empty string as a parameter.

Example  

Install an error management method for the active 4D View area.

 If(PV Get on error method#"ErrMethMan") `Manager not installed?
    PV ON ERROR("ErrMethMan") `Call method
 End if

The code for "ErrMethMan" is as follows :

 C_LONGINT($1) `4D View area reference
 C_LONGINT($2) `Error number
 C_TEXT($3) `Error text
 
 ALERT("Internal error number "+String(ErrorNum)+Char(13)+ErrorText)

 
PROPERTIES 

Product: 4D
Theme: PV Area
Number: 15860

 
INDEX

Alphabetical list of commands

 
HISTORY 

Created: 4D View 6.8

 
SEE ALSO 

Appendix A, List of 4D View error codes
PV GET LAST ERROR
PV Get on error method