Does anyone know how to install Erlang on Windows?

Questions / Help
1

I’m trying to install RabbitMQ on Windows. After hours and hours of installing and uninstalling and reinstalling and Googling I’ve reached the point where this should work, but inexplicably doesn’t:

C:\Program Files\erl-24.0\erts-12.0\bin>epmd.exe -names
epmd: Cannot connect to local epmd

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2

Did you not follow the RabbitMQ - Installing on Windows guide?

Either way, if you don’t have a node up or you have not explicitly started epmd, then it won’t be up and running and thus you won’t be able to connect to it.

Here’s a few examples (not on windows, but works the same regardless) :

$ epmd -names                                  
epmd: Cannot connect to local epmd

Now, I start up a node via erl, which implicitly will start epmd if it’s not already running :

$ erl -sname foo
Erlang/OTP 24 [erts-12.2] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [dtrace]

Eshell V12.2  (abort with ^G)
(foo@myhost)1>

Going into another terminal, I can now run epmd -names successfully :

$ epmd -names
epmd: up and running on port 4369 with data:
name foo at port 58958

Now, when I stop this node, epmd will still be running :

$ epmd -names
epmd: up and running on port 4369 with data:

Likewise I can kill epmd and start it up explicitly via epmd which will run in the foreground or epmd -daemon so that it runs in the background and run epmd -names, getting the same result above (unless I start up a node again).

Finally, I suppose if you’re trying to run rabbitmq and you’re running epmd.exe -names but getting that message, that would indicate that rabbitmq is not running.

More information on epmd can be found here here

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