Error in compiling Erlang project with Rebar3

Questions / Help
1

Hi All, I am getting error while compiling rebar3. I have complete source code for mqtt_client application and mosquitto server is running in my machine. Below is error display:

\rebar3\erl.mqtt.client>rebar3 compile
‘rebar3’ is not recognized as an internal or external command,
operable program or batch file.

2

You need to install rebar3 and make sure it’s available in PATH.

There is a red box under “installing Erlang” explaining installation for Windows users.

2 Likes
3

I am able to compile my project after setting path. Thank you.
I am getting below error while starting my application, could please share the thoughts

Eshell V10.5 (abort with ^G)
1> application:start(mqtt_client).
=CRASH REPORT==== 4-Jan-2020::21:51:57.068000 ===
crasher:
initial call: application_master:init/4
pid: <0.79.0>
registered_name: []
exception exit: {bad_return,
{{mqtt_client,start,[normal,[{vsn,“1.0.3”}]]},
{‘EXIT’,
{undef,
[{lager,start,[],[]},
{mqtt_client,start,2,
[{file,
“f:/Software/MQTT_Client_IOT/rebar3/erl.mqtt.client/src/mqtt_client.erl”},
{line,250}]},
{application_master,start_it_old,4,
[{file,“application_master.erl”},{line,277}]}]}}}}
in function application_master:init/4 (application_master.erl, line 138)
ancestors: [<0.78.0>]
message_queue_len: 1
messages: [{‘EXIT’,<0.80.0>,normal}]
links: [<0.78.0>,<0.43.0>]
dictionary: []
trap_exit: true
status: running
heap_size: 610
stack_size: 27
reductions: 232
neighbours:

{error,
{bad_return,
{{mqtt_client,start,[normal,[{vsn,“1.0.3”}]]},
{‘EXIT’,
{undef,
[{lager,start,[],[]},
{mqtt_client,start,2,
[{file,
“f:/Software/MQTT_Client_IOT/rebar3/erl.mqtt.client/src/mqtt_client.erl”},
{line,250}]},
{application_master,start_it_old,4,
[{file,“application_master.erl”},{line,277}]}]}}}}}
2> =INFO REPORT==== 4-Jan-2020::21:51:57.074000 ===
application: mqtt_client
exited: {bad_return,
{{mqtt_client,start,[normal,[{vsn,“1.0.3”}]]},
{‘EXIT’,
{undef,
[{lager,start,[],[]},
{mqtt_client,start,2,
[{file,
“f:/Software/MQTT_Client_IOT/rebar3/erl.mqtt.client/src/mqtt_client.erl”},
{line,250}]},
{application_master,start_it_old,4,
[{file,“application_master.erl”},
{line,277}]}]}}}}
type: temporary

4

You miss to start the dependencies, please use ensure_started/1 or how it was called to start the full dependency tree.

PS: perhaps you should also tell us which Matt client you are working with.