Thanks a lot! If I change my code to 

    'cause'  => (/CAUSE (\S+)/ ?"$1":'UNDEF'), 
    'effect' => (/AFFECT (\S+)/?"$1":'UNDEF'),

[download]

it works as expected.

In reply to Re^2: Unexpected matching results (dynamic scope "$1") by hdb
in thread Unexpected matching results by hdb

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