Unable to cycle error log file from '%1!s!' to '%2!s!' due to OS error '%3!s!'. A process outside of SQL Server may be preventing ...

Unable to cycle error log file from '%1!s!' to '%2!s!' due to OS error '%3!s!'. A process outside of SQL Server may be preventing SQL Server from reading the files. As a result, errorlog entries may be lost and it may not be possible to view some SQL Server errorlogs. Make sure no other processes have locked the file with write-only access."