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17.3 Aria ChatBot rasa_train error using RASA 1.8.3.


Article ID: 197705


Updated On:


CA Service Management - Asset Portfolio Management CA Service Management - Service Desk Manager


2020-01-01 17:33:43 INFO     rasa_sdk.endpoint  - Starting action endpoint server...

2020-01-01 17:33:43 ERROR    rasa_sdk.executor  - Failed to register package 'actions'.
Traceback (most recent call last):
  File "c:\aria2\botenv\lib\site-packages\rasa_sdk\", line 250, in register_package
  File "c:\aria2\botenv\lib\site-packages\rasa_sdk\", line 213, in _import_submodules
  File "c:\aria2\botenv\lib\site-packages\rasa_sdk\", line 227, in _import_module
    module = importlib.import_module(name)
  File "C:\ProgramData\Anaconda3\lib\importlib\", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Aria2\casm-bot\actions\", line 4, in <module>
    from rasa_core_sdk import ActionExecutionRejection
ModuleNotFoundError: No module named 'rasa_core_sdk'


In rasa_run, this message will also appear:

2020-01-01 17:36:03 ERROR    rasa.core.actions.action  - Failed to run custom action 'search_kd_form'. Couldn't connect to the server at 'http://localhost:5055/webhook'. Is the server running? Error: Cannot connect to host localhost:5055 ssl:default [Connect call failed ('', 5055)]

2020-01-01 17:36:03 ERROR    rasa.core.processor  - Encountered an exception while running action 'search_kd_form'. Bot will continue, but the actions events are lost. Please check the logs of your action server for more information.

aiohttp.client_exceptions.ClientConnectorError: Cannot connect to host localhost:5055 ssl:default [Connect call failed ('', 5055)]

From user perspective, even a simple interaction such as clicking on "I have new issue / problem" will result in this interaction, stating "Relationships and cryptic text are the only two things I am not good at, how about we try again!"



Release : 17.3



Issue is specific to using rasa release 1.8.3.  As a result of the introduction of this release of Rasa, the backend scripts in the casm bot directory need to be updated.


  1. Stop the Aria ChatBot by closing out the Anaconda Command Prompt instance.

  2. Access the "casm-bot" directory where you have the Aria Chatbot installed.

  3. Backup the "actions" directory under the "casm-bot" directory.  We advise copying the entire "actions" directory into a separate folder rather than right click/copy/paste the "actions" directory, creating an "actions - Copy" directory under "casm-bot" directory.

  4. Under the "actions" directory inside the casm-bot, replace the string “rasa_core_sdk” with “rasa_sdk” in all the files.  Save the files when done.
    The easiest way to achieve this is to open all of the files in the "actions" directory in Notepad or Notepad ++ and do a Replace action, changing all references to string “rasa_core_sdk” with “rasa_sdk”

  5. Start a new Anaconda Command Prompt and restart Aria Chatbot:
    cd to the Aria directory

    Run ".\botenv\Scripts\activate"

    cd to the casm-bot directory

    Run "rasa_train", then "rasa_run"

Subsequent interactions will look like this (correct):