OWB Global Variables

NUMBER_OF_ERRORS
NUMBER
Number of errors reported on completion of activity's execution.

NUMBER_OF_WARNINGS
NUMBER
Number of warnings reported on completion of activity's execution.

RETURN_RESULT
VARCHAR2(64)
Textual representation of result. For example, 'SUCCESS', 'WARNING', 'ERROR'.

RETURN_RESULT_NUMBER
NUMBER
Enumeration of RESULT_RESULT1 = SUCCESS2 = WARNING3 = ERROR.

RETURN_CODE
NUMBER
Integer 0-255, specific to activity, synonymous with an Operating System return code.

PARENT_AUDIT_ID
NUMBER
The audit id of the calling Process Flow.

AUDIT_ID
NUMBER
The audit id of the activity.

source: http://download.oracle.com/docs/cd/B31080_01/doc/owb.102/b28223/concept_processflows.htm