When using pipe getting “The filename, directory name, or volume label syntax is incorrect.”

问题

When I run the following command (or any command with a pipe | in it) on my machine:

dir | findstr "Directory"

I get the following message:

The filename, directory name, or volume label syntax is incorrect.

Running dir command or findstr command by themselves works just fine.

The volume label is:

vol
Volume in drive C is OSDisk
Volume Serial Number is 685C-A5B5

The version is:

ver
Microsoft Windows [Version 6.1.7601]

回答1:

As previously mentioned by @dbenham You need to make sure your COMSPEC variable has correct values defined.

It should have the following value:

%SystemRoot%\system32\cmd.exe

You can check it by Right Clicking My Computer-->Properties--->Advanced System Properties-->Environment Variables

If You don't find COMSPEC there, create a new variable by giving the above mentioned value i.e. %SystemRoot%\system32\cmd.exe

Good Luck

回答2:

Check your COMSPEC variable. It should contain the full, absolute path (including file name) to CMD.EXE. Each side of a pipe is executed via a new CMD.EXE thread that is launched via the COMSPEC value.

来源：https://stackoverflow.com/questions/15258695/when-using-pipe-getting-the-filename-directory-name-or-volume-label-syntax-is