It sounds like Norton removed or quarantined the file. You'll have to figure out how to stop it from doing that and replace the file from wherever you got it before, either by compiling it or downloading/unzipping it again.
If I remember correctly Norton360 has always been fairly similar to NIS in alot of ways and if that still holds true then you can set it to exclude entire directories from auto protect and sonar scans. It should be fairly easy to find in the settings.
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