I can repro what the OP sees on 4.60 version.
C:\KiX\4.60>kix32 it $a=0
C:\KiX\4.60>kix32 it $a=1
C:\KiX\4.60>kix32 it $a=2
ERROR : failed to find/open script [it]!
C:\KiX\4.60>kix32 it $a=3
C:\KiX\4.60>
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.