Spotlight is unable to open a migrated connection.
When you open a Spotlight connection, you use connection details that are stored in files somewhere on your local computer or (in the case of migrated connections) somewhere on your network.
When Spotlight cannot access those connection details (for example, when the relevant network machine is unavailable), it displays a Spotlight message box that you can use to change the location where connection details are stored. The choices you have are:
Click to open the Spotlight Migration wizard to change the location where connection details are stored.
Click to abandon the attempt to open the desired Spotlight connection.
Sometimes the network location that you have been using is only temporarily unavailable. Click to reuse the existing connection details to open a Spotlight connection.
Note: You should not migrate connections to locations that may be offline frequently or for extended periods. You cannot migrate connections that are currently in use or inaccessible.
The queries Spotlight uses to collect data can place an additional load on the system under diagnosis.
Most Spotlight queries consume a measurable but not significant amount of system resources. However, queries that are complex or collect large amounts of data may put a significant load on the system.
If you find that the load that Spotlight places on your server is too high, you can adjust collection rates for different categories of Spotlight data, and so limit the load that Spotlight places on the system under analysis.
To choose a standard Spotlight setting or create your own Custom settings
The screen resolution is too low.
Increase the number of colors your computer is using. Spotlight requires a monitor that supports 65536 colors or higher (or Hi Color/16-bit) so that it can properly shade its graphs.
Either the refresh rate is too slow or Spotlight is paused. Do the following:
Check the foreground refresh rate setting (try a rate of approximately 30 seconds).
To view / change the rate click View | Options and select Data collection | Data refresh rates