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Re: [sumo-user] 'Extended retrieval messages' info subscription
subscription to the leader currently works with the dedicated function traci.vehicle.subscribeLeader.
For all other functions, this is not yet working.

see https://github.com/eclipse/sumo/issues/7648

Am Fr., 2. Okt. 2020 um 17:57 Uhr schrieb Marcelo Andrade Rodrigues D Almeida <md@xxxxxxxxx>:
Hi Giuliana

Thank you for your response and sorry for the delay of my reply

I built a simple test case to illustrate the current problem (example.py)

In the example, these variables are tested and the problem only occurs when including 'VAR_LEADER', 'VAR_SECURE_GAP' or both
vehicle_variables_to_subscribe = [
'VAR_SPEED',
'VAR_WAITING_TIME',

#'VAR_LEADER', # Problems with subscription
#'VAR_SECURE_GAP', # Problems with subscription
]

The response error is the following
"Error: Storage::readChar(): invalid positioncles TOT 1 ACT 1 BUF 0)"


Sincerely,

Marcelo d'Almeida

On Sat, Sep 19, 2020 at 8:39 PM <Maria.Armellini@xxxxxx> wrote:

Hi Marcelo,

 

I will copy Jakob's answer to someone who had a similar problem a few days ago. Maybe it will help you J

 

“The _socket gets removed in either of two cases:

- after calling traci.close()

- after receiving a FatalTraCIError "connection closed by SUMO" which can happen if the input data to sumo is faulty or sumo has crashed

If it happens to be the latter with the latest sumo release (1.7.0), please try to boil down your code to a simple test case and provide the necessary files for reproducing the crash.”

 

Regards,

Giuliana

 

From: sumo-user-bounces@xxxxxxxxxxx [mailto:sumo-user-bounces@xxxxxxxxxxx] On Behalf Of Marcelo Andrade Rodrigues D Almeida
Sent: Samstag, 19. September 2020 21:10
To: Sumo project User discussions
Subject: [sumo-user] 'Extended retrieval messages' info subscription

 

Hi everyone

 

How can I subscribe to retrieve 'Extended retrieval messages' information (e.g. vehicle leader and secureGap)

 

Everytime I include these I receive the following error message

 

[...]

#"VAR_LEADER",
#"VAR_SECURE_GAP",

[...]

 

"Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/share/sumo/tools/traci/domain.py", line 208, in subscribe
    self._connection._subscribe(self._subscribeID, begin, end, objectID, varIDs)
  File "/usr/share/sumo/tools/traci/connection.py", line 231, in _subscribe
    result = self._sendCmd(cmdID, (begin, end), objID, format, *args)
  File "/usr/share/sumo/tools/traci/connection.py", line 178, in _sendCmd
    return self._sendExact()
  File "/usr/share/sumo/tools/traci/connection.py", line 83, in _sendExact
    self._socket.send(length + self._string)
AttributeError: 'Connection' object has no attribute '_socket'

"

 

Thank you in advance

 

Sincerely,

 

Marcelo d'Almeida

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