Rockwell Automation 1756-HIST2G Historian ME 2.1 - Manual (Page 155)

8 • A DMINISTERING THE M ODULE
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When the FactoryTalk Historian ME systems are up and running and connection to
the data source is lost, a message similar to the following will be logged:
0 DataCollection 28-Dec-09 19:00:47 [ERROR] HandleNotification()
detected erroneous return condition from notify_on_event API.
This message is logged once for every 300 errors to keep the log disk space from
being flooded with too many error messages.
Sorting the System Log
System log information that meets the specified criteria is displayed in table format.
By default the messages will display the oldest time first and the most recent time
last. Click on the column heading to sort by heading. For example, click on the
Source heading to sort messages by source alphabetically in ascending order.
Defining a System Log View
The following data fields are provided at the top of the System Log page:

Time - use the Time data field to specify time search criteria.
The table uses m for minutes and d for days.
The default is *-5m.

Source - use the Source data field to filter by source.
The default is “*”, where “*” or a blank field means no filtering is used and
messages from all sources are displayed.

Message - use the Message data field to filter by message text.
The default is “*”, where “*” or a blank field means no filtering is used and all
messages are displayed.

Count - use Count to limit the maximum number of log messages that will be
searched out. This field is limited to a maximum value of 5000.
Click [Search] to display messages from the FactoryTalk Historian ME message
service using the criteria specified by the user.
Click [Export] to export all search results into a file saved to the client.
Auto Refresh generates messages in the System Log table for each refresh, making the
System Log table grow quickly when multiple clients perform this action.