Got following message after attempting to open eM Client

System.IO.IOException: The process cannot access the file because it is being used by another process.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.__Error.WinIOError()
   at System.IO.File.InternalMove(String sourceFileName, String destFileName, Boolean checkHost)
   at DbRepair.CorruptionChecker.CheckCorruption(RepairOptions repairOptions, CancellationToken token)
   at DbRepair.CheckingProcess.Check(CancellationToken token)
databaseFile: accounts.dat

Hi Barry,

This error message is saying that another program is accessing your database file so eM Client can’t open it. Usually, it’s caused by the antivirus SW that is scanning the files. Please make sure you put an exception to your Antivirus program so eM Client can open the files.


Thank You but the issue was several MailClient.exe running at the same time.
After I killed all of them eM Client startup properly…