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What does the error mean: WARN: DBLogger::updateCellLogValueFailed Failed to lookup dataitem '<XPath>', log success state may be invalid

In Database Logging, the Gateway will provide status updates for display on the Active Console. The error message indicates that the Gateway has logged data for , but the is no longer present. If this error happens often, the user should investigate on any performance issue with database connection or the Gateway itself.

On the Active Console, the data cells will show a status icon if database logging is enabled.

If the dataview is rapidly changing, it is possible that when certain items are logged to the database, the items may have been removed already. The Gateway would then be unable to locate the XPaths and return the error message.

There is a separate article with subject: Gateway database logging, performance and .dat dump files. Users can follow the suggestions to fine tune database logging, which may help resolve the issue.

Further Reading Copied

Users can check out the Gateway Data Quality Guide on monitoring “m**aximum data age” to investigate whether a Gateway is overloaded.