Failing at QMTDISC in one specific module

IoT Modules LTE Standard Module
1

I have 2 modules, namely EC25-EU, and EC25-E, both PCIe modules. I am sending a list of AT commands through it over LTE, via UART using an ESP32.

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the first block of AT commands(setup commands) gets executed easily over both the modules.
The moment the EC-25-E module is asked to send the MQTT command: +QMTDISC command, it fails and shows the error of:

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I dont understand why it only happens in the EC25-E version and not the EU version. And what the possible methods to fix it might be.

2

Hi @Akshat_Taneja
May I ask when you execute the AT+QMTDISC=0 command, is the 0th socket connected? You can use the AT+QISTATE? command to query.