Network signal quality error -100

My electron device has some communication (information about offline/online), but it cannot have an OTA successfully. The following is the network information.

What does error -100 mean?

{
"device":{
"network":{
"cellular":{
"radio_access_technology":"LTE"
"cell_global_identity":{
"mobile_country_code":311
"mobile_network_code":"580"
"location_area_code":2566
"cell_id":74315011
}
}
"signal":{
"at":"LTE"
"strength":51.54
"strength_units":"%"
"strengthv":-91
"strengthv_units":"dBm"
"strengthv_type":"RSRP"
"quality":{
"err":-100
}
"qualityv":{
"err":-100
}
}
"connection":{
"status":"connected"
"error":0
"disconnects":0
"attempts":1
"disconnect_reason":"none"
}
}
"cloud":{
"connection":{
"status":"connected"
"error":0
"attempts":1
"disconnects":0
"disconnect_reason":"none"
}
"coap":{
"unack":0
}
"publish":{
"rate_limited":0
}
}
"power":{
"battery":{
"charge":{
"err":-210
}
"state":"disconnected"
}
"source":"VIN"
}
"system":{
"uptime":23
"memory":{
"used":43032
"total":113664
}
}
}
"service":{
"device":{
"status":"ok"
}
"cloud":{
"uptime":3
"publish":{
"sent":2
}
}
"coap":{
"round_trip":1381
}
}
}

Hi there,

Thanks for reaching out and sorry for the troubles.

I checked with my embedded team on this and my understanding is this value is returning to a mapped return value from the SARA-R410M module which is an error for not known or not detectable for the qual field for AT+CSQ.

This was actually resolved in Device OS v1.5.0 by changing the AT command from +CSQ to +UCGED instead. If you are not running on at least v.1.5.0, I might encourage you to upgrade.

Why your device is having difficulty updating OTA, I am not certain and would likely require additional information. It may be worth making an attempt to provide recent data and file a ticket with support so that we may dig in further.

Thanks John!