If supplied will try to use it to find the EMIS ID on the alternate search file. If alternate search file is not available then the look up will be attempted on the regular student search file. Will try to match on the alternate search file if available, if not, the standard student search file. Will be used to resolve students with duplicate names. If not provided then duplicate names will cause a failure.
Duplicate names prevent exact match.
If duplicates cannot be resolved then an '02' status is returned. The birthdate and building IRN values will be matched against the student demographics file. If this logical is not defined, by default, the standard student search file is used. The only other requirement is that the student name be in an EMIS format. If no match is found, the student information will print to the report file for possible manual entry.