BL2100 DAC: want to use anaOut but it has neg slope and offset. How can I change slope. Tried anaOutCalib and s/w cal.

BL2100 DAC: anaOutVolts works OK but want to use anaOut…it’s 2x faster but it has strange negative slope: 0 = 10V, and offset. I’ve tried s/w cal routine and anaOutCalib but nothing changes this characteristic. How can I re-config for postive slope? Thanks,