Array search fails after programs running for a long time

[ronmage]

So I have a loop that keeps reading data from an array and searching it for the same value. If the value is no there it does work then adds the value to the array to prevent it from doing the same work.

If _ArraySearch($ID,$filearray[$i]) = -1 Then
    Work....
    _ArrayAdd($ID,$filearray[$i])
EndIf

This is in a for loop hence $i

So what is happening is the code works great for several hours. After a period of time _ArraySearch($ID,$filearray[$i]) will result in -1 even if $ID = $filearray. So it ready as if there is no data in the array. Anyone have this problem? 

 

Also I am just running in using F5 not compiling it and running it if that makes a difference.

 

[BrewManNH]

Post a working example that demonstrates the problem.