STM32 Previous launch did not complete successfully

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1

I am uploading code to Stm32 F446re code but it gives this error "previous launch did not complete successfully". How can I fix this? It does not see Stm32.

2

I am not familiar with your problem so I took to the web and found this:
" The error "previous launch did not complete successfully" when working with the STM32F446RE (typically using STM32CubeIDE or Eclipse-based tools) usually means something interrupted or failed during the last attempt to upload or debug your code. This is not a code error, but an IDE/runtime configuration or hardware communication issue.

Common Causes and Fixes:

1. Debugger or ST-Link Connection Issue

  • Cause: ST-Link was not detected, disconnected, or crashed.
  • Fix:
    • Unplug and replug the ST-Link/USB cable.
    • Make sure no other program is using the ST-Link.
    • Check Run > Debug Configurations > Debugger settings.
    • Try running ST-Link Utility or STM32CubeProgrammer to see if the chip responds.

2. Target Not Responding (Stuck or in Low Power)

  • Cause: The MCU might be in sleep mode or running faulty code that disables debug.
  • Fix:
    • Power cycle the board.
    • Press the reset button while launching debug.
    • Hold reset, start debug, and then release reset to re-capture the core.

3. Launch Configuration Corrupted

  • Cause: The IDE’s internal project configuration is broken.
  • Fix:
    • Go to Run > Debug Configurations, select your config, and click "Delete".
    • Rebuild the project and use Project > Debug As > STM32 Cortex-M C/C++ Application to create a new config.

4. Workspace Corruption

  • Cause: STM32CubeIDE workspace got corrupted.
  • Fix:
    • Try creating a new workspace: File > Switch Workspace > Other...

5. Firewall/Driver/Access Denied

  • Cause: OS-level issue preventing access to debugger or USB device.
  • Fix:
    • Run STM32CubeIDE as administrator.
    • Check dmesg (Linux) or Device Manager (Windows) to ensure ST-Link is detected.

If none of these solve it, let us know:

  • What OS you're using (Windows, Linux, etc.)
  • Whether you're using onboard ST-Link or an external one
  • What IDE version you're running
  • The board (e.g. Nucleo-F446RE?) and how it is connected"

Hopefully this helps. You can also check this link:STM32 Blue Pill and ST-Link V2