A Logical File omitted by the import process can be
manually added as an index, in the analysis.
Set the field as an Index in the file description, and add the following in the
field extended info:
<EASYCOM>
LF=Logical file name
</EASYCOM>
Be careful: All logical files do not point the whole data! Check the selection rules.
A logical file can be imported as a MAIN file. The file will have only one index: Itself.