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LAS\FIND UPDATE [/OPT1 ...]
The input index will first be appended with the new observations (if
any) present in the input file. This saves time because a (much) smaller
part of the input file is actually read. The current index is then reset
and recomputed from the input index (i.e. with old and new observa-
tions), as usual.
FIND UPDATE does not wait for new data, but you can use the command
NEW_DATA to do so.
This keyword can be omitted if the SET FIND mode is UPDATE.