HELPLIB.HLB  —  CRTL  Feature Logical Names, DECC$DISABLE_TO_VMS_LOGNAME_TRANSLATION
    With DECC$DISABLE_TO_VMS_LOGNAME_TRANSLATION enabled, the
    conversion routine decc$to_vms will only treat the first element
    of a UNIX style name as a logical name if there is a leading
    slash (/).
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