For the asynchronous request object handle, the ERROR attribute indicates that the ERROR condition was encountered during the processing of an AppServer or Web Server request. If the COMPLETE attribute is FALSE, the value of this attribute is the Unknown value (?). This attribute is set immediately before the event procedure is executed.
For the COMPILER system handle, the ERROR attribute indicates whether an error occurred in the preceding compilation. If no error occurred in the preceding compilation, the value of ERROR is the Unknown value (?).
For a ProDataSet object handle or a temp-table object handle, the ERROR attribute is reset to FALSE when one of the following methods removes the object's before-image records:
The ERROR attribute is effective only if a before-table is NO-UNDO during a data source update. If the before-table is UNDO, the ERROR attribute is lost.
This attribute is marshalled between the client and the AppServer.
For the ERROR-STATUS system handle, the ERROR attribute indicates whether the ABL ERROR condition was raised in the most recent statement that used the NO-ERROR option. If no ERROR condition was raised in that statement, the value of the ERROR attribute is FALSE.
The ERROR attribute is writeable for a ProDataSet object, a Temp-table object, and a Buffer object. You can set the ERROR attribute programmatically in order to manage the application response to errors. For example, you might set the ERROR attribute to FALSE in order to ignore all errors that might be returned for a statement using the NO-ERROR option. However, note that manually setting this attribute has no affect on ABL error management. Thus, if you set the ERROR attribute to TRUE, the AVM does not also raise the ERROR condition.
Note: Statements such as COMPILE that handle errors as part of their normal function do not raise the ABL ERROR condition. For example, the COMPILE statement does not raise the ERROR condition when it encounters compilation errors in a procedure.
