I am using Timberline Accounts payable module. When trying to access the a/p I get an error message "error opening files". Says that the master.CMM file may be corrupt and to use file doctor. I go to the file doctor to fix any file problems and am receiveing an "I/O error, pervasive status code 46 - access to...." message. I use Carbonite and was able to replace the existing file with an old backup file from a week ago (a/p module was working properly at that time). I have read that the file may be "read only" as a result of simultaneous access from either the carbonite back up or the McAfee virus scanning software. Any way to correct the file by removing the "read only" or could it be a different file that is causing the problem?