Can't run executable that is in Path in Windows docker container

Question

I am trying to run an executable from inside of a container from Power Shell and get an error message that it could not be found. However I've confirmed its directory is in Path and the executable is where I expect it to be. What am I missing?

PS C:\work\some_project> docker run -it --rm --name="iar_build" iar_env
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PS C:\docker_work> IarBuild.exe
IarBuild.exe : The term 'IarBuild.exe' 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.
At line:1 char:1
+ IarBuild.exe
+ ~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (IarBuild.exe:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

PS C:\docker_work> $Env:Path
C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\
OpenSSH\;C:\Users\ContainerAdministrator\AppData\Local\Microsoft\WindowsApps;C:\Program Files (x86)\IAR Systems\Embedded
 Workbench 8.1\common\bin"
PS C:\docker_work> ls 'C:\Program Files (x86)\IAR Systems\Embedded Workbench 8.1\common\bin\IarBuild.exe'


    Directory: C:\Program Files (x86)\IAR Systems\Embedded Workbench 8.1\common\bin


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
-a----         9/1/2018   4:09 AM         724992 IarBuild.exe


PS C:\docker_work>

My docker file contains the following:

...
# Add the IAR common\bin\ folder to the image's PATH
RUN setx path \
  "%path%;C:\Program Files (x86)\IAR Systems\Embedded Workbench 8.1\common\bin\"
...
CMD [ "powershell.exe", "-executionpolicy" , "Unrestricted" ]

Answer 1

You will need to add a.\ so it will look like.\IarBuild.exe as it is currently trying to process the.exe as a cmdlet

Edit: If you start to type the name of the exe and press Tab it will autocomplete to.\IarBuild.exe if not type in manually

Hope that helps