Can you please post your complete project, so that we all can have a look at all of your settings. To do so, use
Creator->File->Create Workspace Bundle (minimal)
and attach the resulting file. This would ease the checking for us.
Hi Frederick! I am sorry to tell you this is a mistake in the datasheet. You will be able to use only upto 4 single-ended channels with the SAR ADC. In some cases, when the Analog MUX Bus is not used, you might be able to use 6 channels. Thanks for bringing this into our notice!
Ok, I think I can get away with just 6 x single ended channels. thanks!