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Keil MDK 5.43: Code completion and warnings disappear after build

Thanh Pham

Title: Keil MDK 5.43: Code completion and warnings disappear after build

Hello,

I am using Keil MDK version 5.43 with Arm Compiler version 6 default on Windows 10 (64-bit).
Device pack: Keil::STM32F4xx_DFP@3.1.1

Issue:
- When generating a project from STM32CubeMX, code completion and error/warning highlights work normally.
- After a successful build, code suggestions (Ctrl+Space) and warnings no longer appear.
- Restarting µVision restores code completion until I build again, then it disappears once more.

What I tried:
- Verified that Code Completion is enabled in Editor settings.
- Rebuilt all target files and deleted Objects/Listings folders.
- Checked include paths and preprocessor symbols (USE_HAL_DRIVER, STM32F407xx).
- Reinstalled STM32 device pack and resolved RTE.

Is this a known bug in MDK 5.43? Any workaround to keep code completion active after building?

Thanks,
[Phạm Thành]