We use Adobe Central Server 5.7 to convert data files to fax advices (using VSI-FAX) on a Windows servers. Occasionally while processing the jftrans process hangs for no apparent reason. There are no error messages in the logs or system events/warnings. Terminating the jftrans process allows processing to continue. We reboot the Windows on a monthly basis. The number of hangs seems to increase as moves out from the reboot date.