Not able to get multi-channel ADC continuous read with DMA to function

Using an STM32H757-EVAL (don't use CM4) with CubeMX. Configured my ADC1 as follows:

DMA is:

Start the process as follows (both calls return HAL_OK):

I allow the code to run for 10 seconds and break. The m_hv_status_values buffer still has the initial values:

My expectation is that after the call to the HAL_ADC_Start_DMA, the ADC should scan all 6 channels continuously and put resulting conversions into the m_hv_status_values circular buffer sequentially. Any suggestions would be appreciated.

Gil

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