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    User name X. Jiang

    Log entry time 18:46:30 on April21,2003

    Entry number 97966

    keyword=left arm pion rejector. most likely a software problem.

    At cosmic runs, run 20055 left arm for example,
    the first layer lead glass blocks showed up fine, but the second layer
    none showed up.

    I went downstairs again, checked at the signal before feding to ADCs,
    the signal looks fine.

    Since hardware wise, the first layer and the second layer blocks are treated the same way, so there's no way a hardware failure could wipe the second layer all out.

    Seems like this is most likely a software kind of problem, between the detector
    map, raw data decoding and variable transports in the code.

    It can not be a timing problem, since all the other first layer blocks are fine.