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Copy file name to clipboardExpand all lines: articles/iot-develop/troubleshoot-embedded-device-quickstarts.md
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---
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title: Troubleshooting the Azure RTOS embedded device quickstarts
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description: Steps to help you troubleshoot common issues when using the Azure RTOS embedded device quickstarts
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author: JimacoMS4
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ms.author: v-jbrannian
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author: timlt
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ms.author: timlt
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ms.service: iot-develop
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ms.topic: troubleshooting
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ms.date: 06/10/2021
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ms.custom: contperf-fy22q4
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---
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# Troubleshooting the Azure RTOS embedded device quickstarts
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### Description
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The issue can occur because the path to an object file exceeds the default maximum path length in Windows. Examine the build output for a message similar to the following:
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The issue can occur because the path to an object file exceeds the default maximum path length in Windows. Examine the build output for a message similar to the following example:
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```output
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-- Configuring done
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You can try one of the following options to resolve this error:
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* Clone the repository into a directory with a shorter path and try again.
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* Follow the instructions in [Maximum Path Length Limitation](/windows/win32/fileio/maximum-file-path-limitation) to enable long paths in Windows 10, version 1607 and later.
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* Follow the instructions in [Maximum Path Length Limitation](/windows/win32/fileio/maximum-file-path-limitation) to enable long paths in Windows 11 and Windows 10, version 1607 and later.
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## Issue: Device can't connect to Iot hub
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### Description
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The issue can occur after you've created Azure resources, and flashed your device. When you try to connect your newly flashed device to Azure IoT, you see a console message like the following:
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The issue can occur after you've created Azure resources, and flashed your device. When you try to connect your newly flashed device to Azure IoT, you see a console message like the following example:
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```output
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Unable to resolve DNS for MQTT Server
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### Description
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After you flash a device that uses a Wi-Fi connection and try to connect to your Wi-Fi network, you get an error message that Wi-Fi is unable to connect.
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After you flash a device that uses a Wi-Fi connection, you get an error message that Wi-Fi is unable to connect.
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### Resolution
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### Description
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You can't complete the process of flashing your device. You'll know this if you experience any of the following symptoms:
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You can't complete the process of flashing your device. The following symptoms indicate that flashing is incomplete:
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* The **.bin* image file that you built doesn't copy to the device.
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* The utility that you're using to flash the device gives a warning or error.
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### Description
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After you flash your device and connect it to your computer, you get a message like the following in your terminal software:
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After you flash your device and connect it to your computer, you get output like the following message in your terminal software:
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```output
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Failed to initialize the port.
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### Description
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After you flash your device and connect it to your computer, you get a repeated message like the following in your terminal window:
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After you flash your device and connect it to your computer, you get output like the following message in your terminal window:
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```output
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Failed to publish temperature
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### Description
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Because [Defender for IoT module](/azure/defender-for-iot/device-builders/iot-security-azure-rtos) is enabled by default from the device end, you might observe extra messages that are caused by that.
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Because [Defender for IoT module](/azure/defender-for-iot/device-builders/iot-security-azure-rtos) is enabled by default from the device end, you might observe extra messages in the output.
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