Tracker GV500 - Device management - cumulocity

I currently registered my Quecklink GV500 to cumulocity and I'm able to receive some events and measurements.
But when I try to send command to my Quecklink GV500 registered in Cumulocity but I always hava a FAILED response. For example, I tried to send this command (which is fully supported by the GV500) from SHELL tab: AT+GTTMA=gv500,+,1,0,0,,,,,,FFFF$
And as result I got:
Failure reason: Command currently not supported
I also tried to get the agent logs by using "Log file request" in the "Log" tab of my Device and as result I got:
Failure reason: Cannot build command. Search parameters only allow the
following characters [a-zA-Z0-9_]
Is it normal?
When I look the general information in "Info" tab I have:
Send connection: online
Push connection: inactive
Is it normal that Push connection is marked as inactive?

The tracker-agent in it current state does not use a push connection for receiving operations but does a polling of the operations. Therefore the push connection is always shown as inactive.
If you receive "Failure reason: Command currently not supported" it is an error from the agent not the device. The agent seems not to support shell operations for Queclink.
As for the error on the log file request it seems that there was an unsupported character in the search parameter. Maybe you can share what you entered for the parameters in the UI

Thanks for your answer. For the log file request I let blank value in the search input field. If I try to enter "gl200", I get the following error: Command currently not supported.
So to resume can you confirm that Quecklink devices can't be managed from Cumulocity for the moment? It's supported for which device?

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The first thing I do on method implementation is check for network reachability, discarding operation if its no available.
Then I start refresh process executing fetchMessagesOperationWithFolder on a IMAP session.
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Edit
I'm adding ConnectionLog, it take me long to reproduce the error. Its very clear why I receive a MCOErrorAuthentation: I'm not loading password well.
2014-12-18 21:00:41.212 * OK Gimap ready for requests from 85.58.177.133 et58mb78762219web
2014-12-18 21:00:41.222 1 CAPABILITY
2014-12-18 21:00:41.302 * CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 XYZZY SASL-IR AUTH=XOAUTH AUTH=XOAUTH2 AUTH=PLAIN AUTH=PLAIN-CLIENTTOKEN
1 OK Thats all she wrote! et58mb78762219web
2014-12-18 21:00:41.304 2 LOGIN “polferresamon#gmail.com" ""
2014-12-18 21:00:41.378 2 NO Empty username or password. et58mb78762219web
2014-12-18 21:00:41.380 Error fetching messages: Unable to authenticate with the current session's credentials.
So, to really solve MCOErrorAuthentication I have to check IMAP session init, and the process where I'm loading email and password when returning from background.
I guess parse and connection errors are due to connection issues.
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