Safest way to run BAT file from Powershell script

Question

I can not get a powershell script to execute a bat file directly. For example, this works on the command line:

.\\my-app\my-fle.bat 

When I add this command to a script, it outputs:

The term '.\\my-app\my-file.bat' is not recognized as the  name of a cmdlet, function, script file, or operable program.  Check the spelling of the name, or if a path was included,  verify that the path is correct and try again. 

I also tried the following, with the same result:

& .\\my-app\my-fle.bat & ".\\my-app\my-fle.bat" \my-app\my-fle.bat & \my-app\my-fle.bat & "\my-app\my-fle.bat" 

Note: It must return the lastexitcode as I need to verify success of batch.

Answer 1

cmd.exe /c '\my-app\my-file.bat'