Diagnosis
When the log was formatted, a running transaction in a CATT procedurehas probably terminated.

System Response
It is fundamentally impossible to tell from the CATT log, when atransaction is terminated, because that terminates the complete CATTsession. The log can then not be completed and closed. It is alwayspossible that the transaction is still active.
The only indication is the elapsed time. The log assumes that atransaction has terminated if it started more than 20 minutespreviously.
If less than 20 minutes have elapsed, the message TT 148: 'Theprocedure has been activefor & minutes' is entered in the log.

Procedure
As the function refresh is no longer available after more than 20minutes of transaction time, the log can be refreshed via F3 'Back' andre-selection. It is possible that the CATT procedure may haveprogressed in the meantime, if it contains long-running transactions.
As this becomes ever less likely as time passes, you should look forthe cause of termination in the system log.