Example

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Example

#Depending on the value for a field in one segment, it makes 
#another segment further down the segment grammar a required segment.

message_grammar_iterator.move_to_parentgrammar(); #move from PER to Loop2310A
message_grammar_iterator.move_to_subgrammar("REF"); #move to the REF

#get the grammar
the_grammar =  message_grammar_iterator.message_grammar();
#set situationally required.
the_grammar.set_situationally_required();

# if the REF segment does not exist, this code will be run.
# An exception should be raised here

Error = chmexception.errorobject 
Error.description = "REF segment is missing when PRV segment in Loop2310A is present"
raise chmexception

Error Code: 0x80002006
Description: REF segment is missing when PRV segment in Loop2310A is present
FieldName: Provider Code
MessageSegmentName: PRV
SegmentRepeatIndex: 0
GrammarSegmentName: REF
ValidationRuleClassId: 4
FieldIndex: 1
ValidationRuleClassName: Situational Python Validation Rule
ValidationRuleName: Segment makes REF mandatory
MessageSegmentIndex: 26

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