SecretManager problem

Hi,

I installed "SecretManager" by running (in command prompt):

dnvm use 1.0.0-rc1-final
dnu commands install Microsoft.Framework.SecretManager --overwrite

After installing when running user-secret -h I get the following errors:

System.NullReferenceException: Object reference not set to an instance of an obj
ect.
at Microsoft.Framework.SecretManager.CommandOutputProvider..ctor(IRuntimeEnvironment runtimeEnv)
at Microsoft.Framework.SecretManager.Program..ctor(IRuntimeEnvironment runtimeEnv)

Anyone an idea what (I'm doing/goes wrong?

Thanks.
Guy