Invalid reference format for docker run at powershell console

Invalid reference format for docker run at powershell console

Host is windows 10 an docker version is Docker version 18.09.0, build 4d60db4

1)in c:users , created a local directory called gatling , and under it I created 3 sub-directories: conf, results and user-files. I left the conf and results directories empty, and under user-files I created a simulations directory containing a Gatling load test scenario written in Scala. I also created a file in the user-files directory
2)gave command as docker run -it --rm -v c:/Users/gatling/conf:/opt/gatling/conf
-v c:/Users/gatling/user-files:/opt/gatling/user-files
-v c:/Users/gatling/results:/opt/gatling/results
denvazh/gatling
3)powershell complaining C:\Program Files\Docker\Docker\Resources\bin\docker.exe: invalid reference format.

Mind you ,i have shared c: as shored folder from settings section of docker also below command works fine i.e. gives output

docker run --rm -v c:/Users:/data alpine ls /data