Hi, If I submit a DEL_HOST_COMMENT or DEL_SVC_COMMENT line to the named pipe of Nagios i see a line like this in nagios.log: [1280008668] EXTERNAL COMMAND: DEL_HOST_COMMENT;host-name;19117 No errors follow, but the comment is not deleted - still shows up in status.dat and retention.dat, even if I wait till the retention.dat interval is reached, even if I shut down Nagios normally the change is not persisteed / processed properly. If I submit a DEL_ALL_HOST_COMMENTS or DEL_ALL_SVC_COMMENTS API command to the named pipe, the operation works within seconds. From the Nagios UI - same thing for both operations, which makes sense since it just submits to the named pipe as well. I am trying to track down what code is failing for the DEL_HOST|SVC_COMMENT commands now - if any of you have seen this behavior before or know what might be causing it, would welcome the feedback. Again, this happens when submitting commands directly to the Nagios named pipe. - Max