This situation triggers when the percentage of TIBs (Transaction Instance Blocks) in use for a TMEMBER is 80% or higher. Corrective action may be needed in order to prevent an OTMA flood condition which occurs when the number of TIBs in use is 100%. TMEMBER input is rejected until the flood condition is relieved. TIB growth can occur due to a stopped program, unavailable message region, message arrival rate exceeds processing rate, or failure to generate a CM1 IOPCB response leaving orphanned TIBs.
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