Interpreters Document


fields be on the first line and not separated as on a continuation line using the F8 continuation Op-



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dps Interpreters

fields be on the first line and not separated as on a continuation line using the F8 continuation Op-
Code). 
 
If the response code is not found in the goto fields then the $FF goto will be used to determine the next 
Interpreter step.
If the service request
has a negative response code that
 is NOT
the same as an expected positive response 
message response service ID plus $40: 
The Interpreter shall look for the 
FIRST
occurrence of the response code 
in the goto fields
to determine the 
next Interpreter step. If the response code is not found in the goto fields then the $FF goto will be used to 
determine the next Interpreter step.
Developers Note: 
 
This processing puts the requirement for the Interpreter into the hands of the developers who know what 
response codes are possible for a particular service request. When a developer is writing the Interpreter 
instructions the need for duplicate goto fields will be obvious and should not present any problems. 
Negative response processing
Utility File Example and Pseudo Code 
Following is the message structure and utility line for pseudo code example below. 
PositiveResponse 
ServiceID
$77
RequestMessage 
ServiceID 
$37 
NegativeResponse
ResponseID 
RequestID 
ResponseCode 
$7F 
$37 
$77 
Step 
Op-Code AC0 
AC1 
AC2 
AC3 
G0-G1 G2-G3 G4-G5 G6-G7 G8-G9 
12 
37 
00 
00 
00 
00 
77-1B 
41-17 
72-17 
77-18 
FF-15 
If
a PositiveResponse is received (ResponseServiceID is RequestMessageServiceID + $40). 
Use the first occurrence of the PositiveResponseServiceID ($77) to determine next step. 

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