When we use the preview component in the web GUI we don' t get the result we expect. Instead we get an error which we can't explain. Do we need to adjust some security settings? To me it looks like the preview component needs to access local file storage.
Best answer by Erik Brink
We enabled file caching of the preview component in our Web GUI a few releases ago. The preview component now takes a dependency on the "App_Data" directory within the directory the GUI is deployed to on the web-server.
To perform the file caching the IIS Application Pool user(Identity) needs read and write rights to the "App_Data" directory.
This was already needed for using a file upload control storing a uploaded file temporary until the record is saved.
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