EM7411 - modem fails to switch to offline mode when updating firmware

Hello, I’ve been trying to update the firmware of an EM7411 but keep getting “ResetDev: Modem failed to switch to OFFLINE mode”.

I am updating several modems. Interestingly, this only happens to a few of them. Others are able to be updated successfully without issues.

Here is the full command and output:

# fwdwl-litearm -d /dev/ttyUSB0 -p /dev/cdc-wdm0 -t 1 --modelfamily 4 -c QMI --fwpath /var/tmp/modem-firmware --cwe SWI9X50C_01.14.03.00.cwe --nvu SWI9X50C_01.14.03.00_TMO_002.005_000.nvu
Application version: 1.0.2106.0
INFO: QDL Port  :  /dev/ttyUSB0
INFO: Device Path: /dev/cdc-wdm0
INFO: FW  Path  :  /var/tmp/modem-firmware
Target image Info:
Carrier    :TMO
FW Version :
Model ID   :SWI9X50C
Package ID :000
PRI Version:002.005
SKU        :9999999
Switching device into download mode ...
Modem Needs PRI
ResetDev: Modem failed to switch to OFFLINE mode
Exiting Application!!!

Any help is greatly appreciated. Thanks!

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