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TB005  MISSING CHANNEL+DEV END / INTERRUPT PENDING
 
                J.D.S. MicroProcessing Technical Bulletin             
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Date Written: 08/02/89                   Submitted by: R. SANDE     
    Sequence: 1 of 1                           FileID: 4.TB006      
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             MISSING CHANNEL+DEV END / INTERRUPT PENDING              
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  Missing Channel and Device End (or Interrupt Pending) - Indicates    
that the unit attached failed to present a reply to a time-out or      
intervention state on the channel.

When this occurs, the DOS/VSE Supervisor (or system nucleus) then presents the message on the operator console. It is possible to use the Hydra-II "FORCE STAT 04" to generate an artificial device end to the channel in order to restore normal operations.

Note: there is no equivelant "FORCE STAT" command on either HYDRA-SNA or HYDRA-3000 Systems.

Under certain circumstances (usually VSE systems) an error of this nature would take the system down to a screeching halt. It is a deteriorating type of error and left untreated will worsen as processing cycles continue.