The path is not being monitored by an agent on the same machine. You must specify an agent for your remote path being monitored.

This error indicates that all of your paths are referencing "[local agent]". When configuring a Real Time Monitor, you must reference the SPIAgent installed on the machine to which the path is local. For instance, assume you’re synchronizing a directory named c:\data between a machine name "mainmachine" and a machine named "testmachine". "mainmachine" is where the full SureSync software is installed. The other machine has the SPIAgent only.

You might have the following for your root paths:

Agent Path Relative To Agent
[local agent] c:\data
[local agent] \\testmachine\data

This will work when run manually and in a Schedule. It will not work in a Real-Time Monitor because it is not using the agents for each path.

Instead it should be:

Agent Path Relative To Agent
[local agent] c:\data
testmachine c:\data

This tells SureSync to use the agent on testmachine for accessing the path on that computer. This enables the functions of the SPIAgent including the Real-Time Monitor and will stop the error from occuring.