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Hot to do a discovery using Device authentiction

Associate III

Did numerous builds using CubeIDE (10,000 lines of code). this error started coming up. "reason was unknown target"

Got the following message:

Make -j4 all  DriversSTM32L4xx_HAL_Driver/  *** unable to generate command line.  stop.  "make  -j4 all"   terminated with exit code 2. Build might be incomplete.    Build failed. 1 error 0 warnings

Cannot clear the problem. In IDE Debug configurations,  Project, Tool settings,  MCU settings ---There is nothing in the MCU and board (Custom board) slots.



Pavel A.
Evangelist III

Do you have a backup? Version control?