docker: Error response from daemon: OCI runtime create failed: container_linux.go:345

I have downloaded the anaconda docker image from here and I am running it on MacOS. I have come across the following issue and I would highly appreciate your help! When I try running Ipython by the following command docker run -it pyimg ipython I get the error > docker: Error response from daemon: OCI runtime create failed: > container_linux.go:345: starting container process caused "exec: > \"ipython\": executable file not found in $PATH": unknown. This makes me think that the $PATH in docker does not entail the location of ipython. However, when I spin the container by first executing the bash and then by launching ipython, everything works fine! More precisely, docker run -it pyimg bash and then ipython works fine.. To make things even more confusing, docker run -it pyimg python works perfectly! I already checked inside the container and realized that both python as well as ipython are located in the same directory **/opt/conda/bin** How is it possible that this behavior is exhibited and how can I fix it? Thank you very much in advance for your help!