1.6.1 Investigation Tool

The openfiles.exe lists the processes using file handles.

Table 1.6 Features of openfiles.exe
Item	Explanation
Method of obtaining	Installed as standard in OS
Setting method	Refer to "1.6.2.2 Setting openfiles.exe". (Restarting the server is required on setup.)
OS performance deterioration resulting from investigation tool use	Yes (Enabling 'maintain objects list' reduces the OS performance.)
File for a display	Only the file that is used by the user executed openfiles.exe. AdvancedCopy Manager commands or services execute openfiles.exe in this function. The files for a display are as follows. The file that is used by the user executed AdvancedCopy Manager commands. (In case of "in-use lock error" in command execution server) The file that is used by AdvancedCopy Manager startup account. (In case of "in-use lock error" in the destination server)
Maintenance	Microsoft provides support (openfiles.exe is an OS standard function)

The openfiles.exe is able to identify the cause only if the process is using (i.e., if it opened) a file or directory. Thus, this tool is not able to identify the cause if the following conditions apply:

Target volume is being used by a driver.
An application has loaded a DLL in the target volume.

If this tool cannot identify the cause, then investigate whether the conditions above applied in the applications or services that were running when the error was issued.

Note

Occasionally openfiles.exe does not output any information - this problem is thought to be caused by the OS load or an OS incompatibility, but at the moment there is no means of avoiding it.

Point

It is recommended to confirm if the processes causing "in-use lock error" exist by executing "openfiles.exe /query /v" manually before executing backup or replication. Refer to "1.6.5 How to Investigate Process Where Volume Is Used".