Internal Error when using a Cluster

I just started getting this error message when I try to use a 6-Core cluster:
An internal error occurred: NSException raised by 'NSPortTimeoutException', reason = 'connection timeout: did not receive reply'.
I have never had this problem before. I can compress without a problem if I select "This Computer" instead of the Cluster.
Any ideas? I guess I could try re-making the Cluster.

I had it set up for 6 of 8 cores. I have 10GB ram. It has been working perfectly for over a year. I haven't had any problems until today.
I will reset Qmaster. Thanks.

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    TCode
    Grp
    N
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    Terminal
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    SAPMSSY1
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    Offset
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    System log type
    Grp
    N
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    618840
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    Terminal
    Session
    TCode
    Program
    Cl
    Problem cl
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    03084
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    TOM
    om-blr-l
    1
    SMEN
    SAPLSMTR_NAVIGATION
    K
    SAP Web AS Problem
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    Module nam
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    Table Name
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    dbrepolo
    172
    8
    Documentation for system log message BZ Y :
    When calling a function within the database interface, a return
    value which cannot be processed by the calling function was
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    File
    Offset
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    N
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    11160
    h
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    BZ
    Y
    8                                                   dbrepolo172
    Edited by: Thomas Paul jr on Feb 14, 2011 6:36 AM
    Edited by: Thomas Paul jr on Feb 14, 2011 6:38 AM

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