Typically you can have refreshes much more frequent - particularly if you
have a robust incremental load strategy.
To allow user triggered reloads you should look at using EDX to fire
reloads. Once you have these you can use a simple script or batch file to
trigger reloads. If you want to trigger from inside a QlikView app you can
either have a link in the app to a web hosted script (eg. ASP.net) or code
something in an extension.
Macros can do reloads, but are not always reliable on the server.
Steve
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