Resolved! DMIE typo (should be DMEIE)
In RM0430 Rev 8, 9.3.19 DMA "Error management":an interrupt is generated if the corresponding interrupt enable bit (TEIE, FEIE, DMIE) in the DMA_SxCR or DMA_SxFCR register is set.It should say "DMEIE", not "DMIE"