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Home > Success Center > ipMonitor > ipMonitor - Knowledgebase Articles > Monitor Error: Overlapped I/O operation is in progress

Monitor Error: Overlapped I/O operation is in progress

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Why are my Monitors failing with “Overlapped I/O operation is in progress”?

These errors stem from the Windows APIs used for monitoring over WMI where one of its threads is attempting to use a disk or socket handle that is already in use by another thread.  This is not something that can be controlled by ipMonitor.  The Monitors that typically use WMI are resource-based Monitors (CPU, Memory, Drive Space and Services) and Windows Event Log.

 Suggested workaround.

 1. Use SNMP, instead of WMI whenever possible.

 or

 2. Move ipMonitor to a Windows Vista or 2008 system as its APIs can better handle overlapped I/Os which are in progress.

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