You can get more details about error codes from Legato source code.
Example, from your log we can see the following error message:
le_mdc.c le_mdc_StartSession() 797 | Get Connection failure 11, 1018, 6, 33
From “le_mdc.c” source file, in “le_mdc_StartSession()” function, we can see that the first value (“11” in this example) is defined in the “le_mdc_DisconnectionReason_t” enum:
legato.io/legato-docs/latest/le_ … ource.html
LE_MDC_DISC_REQUESTED_SERVICE_OPTION_UNSUBSCRIBED = 11,
///< cf. 3GPP 24.008 Annex I1
So, you have been disconnected from network due to “requested service option not subscribed” (this is the reason returned by the network).
Jay