playbacks stalled with no indication

Hello Andrew,

do you have support case opened for this issue? If not you should definitely do so, so we can look at what is the cause of this behavior.

Meanwhile you can try to use following Custom SQL Alert definition (for SEUM: Transaction):

JOIN SEUM_Transactions
                    ON SEUM_TransactionsAlertsData.TransactionId = SEUM_Transactions.TransactionId
JOIN SEUM_Agents
                    ON SEUM_Agents.AgentId = SEUM_Transactions.AgentId
WHERE ( SEUM_TransactionsAlertsData.IsEnabled = 1
                    AND DATEPART(year,SEUM_Transactions.LastDateTimeUtc) > '1900'
                    AND DATEADD(second, (3 * SEUM_Transactions.Frequency), SEUM_Transactions.LastDateTimeUtc) < GETUTCDATE()            
                    AND SEUM_Agents.ConnectionStatus = 1
)

The alert should be fired whenever the transaction didn't run for 3 cycles. You can modify the number of cycles to fit your needs.