FortiClient 5.2.3 Windows Offline Files

Hi

I've started deploying FortiClient at a number of sites. Many of my users use offline files. When realtime protection is enabled in Forticlient it breaks the syncing of offline files with the error The parameter is incorrect. Turn off realtime protection and everthing works.

The offline files are the users my docs, pics etc... which really need to be protected by the AV

An ideas welcome

Thanks