Hello! When does the error occur?
I recommend upgrading the firmware. If the issue is related to Fax Archive feature it will fix the problem.
You can download new firmware http://h20566.www2.hp.com/portal/site/hpsc/public/psi/swdHome/?cc=us&cc=us&lang=en&lang=en&sp4ts.oid=4073024&ac.admitted=1404251131247.876444892.199480143
