Dual logging is lost

Symptoms

WebSphere MQ issues the following message:

CSQJ004I +CSQ1 ACTIVE LOG COPY n INACTIVE, LOG IN SINGLE MODE,
           ENDRBA=...

Having completed one active log data set, WebSphere MQ found that the subsequent (COPY n) data sets were not off-loaded or were marked stopped.

System action

WebSphere MQ continues in single mode until off-loading has been completed, then returns to dual mode.

System programmer action

None.

Operator action

Check that the off-load is proceeding and is not waiting for a tape mount. You might need to run the print log map utility to determine the state of all data sets. You might also need to define additional data sets.