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Monitoring .txt file, indexation problem

medsy
Explorer

| inputlookup file.csv | search NOT [search index=sph | dedup DMC | table DMC ] | dedup number

In my scenario I have two files, a csv static file with a constant list of data and a .txt file which contains either the entire contents of the csv file or some. in fact I want to make a comparison if an element is not in the .txt file and it is in the csv file I display it in suite I alert. the problem now is in the monitoring of the .txt file, sometimes when it is a single line that changes it displays all the elements already present at the level of the .txt file as missing because it does not reindex.
can we monitor a file without indexing?

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