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LP11xx SWD disabled when AD4 enabled

I wanted to use analog input AD4 on an LP11xx device - this turns off the SWDIO function, now I can't use the Ulink2 device as I get SWD communication error messages.
If I select connect under reset in the settings area, which according to the help should overcome this issue, I get a 'could not access memory' message first time, then a 'device could not be powered up' message on the second attempt to erase the device.
Is there a way of recovering the device without booting into ISP mode - I can't easily get access to GPIO0_1.
Thanks,
Peter