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The following command produces incorrect illustrator output in the last several positions of the filteredBasis:

cameron@cs-osl-08:~/parabix-devel/build16$ bin/csv_column 1 ../tools/csv/inputTest.csv -FilterBasisBits -enable-illustrator -BlockSize=64
date
2020-01-21
2020-01-22
2020-01-23
2020-01-24
2020-01-24
2020-01-25
2020-01-25
        ByteStream | date,county,state,fips,cases,deaths  2020-01-21,Snohomish,Washington,53061,1,0  2020-01-22,Snohomish,Washington,53061,1,0  2020-01-23,Snohomish,Washington,53061,1,0  2020-01-24,Cook,Illinois,17031,1,0  2020-01-24,Snohomish,Was
    BasisBits[4-7] | 6676266767727767626677266767266676700333323323325666666762567666676623333323230033332332332566666676256766667662333332323003333233233256666667625676666766233333232300333323323324666246666667233333232300333323323325666666762567
    BasisBits[0-3] | 4145C3F5E49C34145C6903C31353C451483DA2020D01D21C3EF8FD938C71389E74FEC53061C1C0DA2020D01D22C3EF8FD938C71389E74FEC53061C1C0DA2020D01D23C3EF8FD938C71389E74FEC53061C1C0DA2020D01D24C3FFBC9CC9EF93C17031C1C0DA2020D01D24C3EF8FD938C713
  recordSeparators | ....................................1..........................................1..........................................1..........................................1...................................1........................
   fieldSeparators | ....1......1.....1....1.....1.......1..........1.........1..........1.....1.1..1..........1.........1..........1.....1.1..1..........1.........1..........1.....1.1..1..........1....1........1.....1.1..1..........1.........1...
          Selected | 1111................................11111111111................................11111111111................................11111111111................................11111111111.........................11111111111..............
filteredBasis[4-7] | 6676033332332330333323323303333233233033332332330333323323303333233233233233033332
filteredBasis[0-3] | 4145A2020D01D21A2020D01D22A2020D01D23A2020D01D24A2020D01D24A2020D01D25D01D25A2020D
          Filtered | date 2020-01-21 2020-01-22 2020-01-23 2020-01-24 2020-01-24 2020-01-25 2020-01-25 

        ByteStream | hington,53061,1,0  2020-01-25,Orange,California,6059,1,0  2020-01-25,Cook,Illinois,17031,1,0  
    BasisBits[4-7] | 6666766233333232300333323323324766662466666766623333232300333323323324666246666667233333232300
    BasisBits[0-3] | 89E74FEC53061C1C0DA2020D01D25CF21E75C31C96F2E91C6059C1C0DA2020D01D25C3FFBC9CC9EF93C17031C1C0DA
  recordSeparators | ..................1......................................1...................................1.
   fieldSeparators | .......1.....1.1..1..........1......1..........1....1.1..1..........1....1........1.....1.1..1.
          Selected | ..................11111111111............................11111111111.........................1.
filteredBasis[4-7] | 
filteredBasis[0-3] | 
          Filtered | 

The incorrect data is in the final 12 items:

233233033332
D01D25A2020D

This would transpose back to

-01-25
2020-

when the correct output is:

 2020-01-25

The actual computed filteredBasis seems to be correct, because the Filtered data produced by p2s is correct, so it appears to be an illustrator problem.