KDFAP1231E NON-NUMERIC RESULT FROM REXX EXEC [exec_name]

Explanation
 			 				A non-numeric result was returned by the specified REXX 				exec. The exec should provide a numeric result. 			 		
System action
 			None. 		
User response
 			 				This error could have been caused by an error in the 				stated REXX exec. Unless you have changed the exec, 				contact IBM® Software Support providing this message with 				the REXX exec name. If this problem has not been 				reported previously, you must determine why the REXX 				exec did not return a numeric result. The routine 				calling REXX, KDFIRACT, could have failed to indicate 				that the REXX exec was being called as a command, or a 				REXX error could have occurred. REXX should detect an 				error (and issue message IRX0026) if a non-numeric 				result is being returned by an exec called as a command. 			 		