Is there a trick to - or is it not possible - to book a 3-leg trip that includes a KLM leg?

Looking at MKE-MSP/ATL/DTW-AMS/CDG-OSL.

If I try MSP/ATL/DTW-OSL I get results (usually w/ exorbitant number of miles) but trying to leave from MKE I get the 'no flights match your requirements' or whatever the message is.

Just a situation where I need to call in?

Don't have an issue w/ a positioning flight, but rather not pay any more miles than necessary.

(What I am actually hoping for is another D1 sale that gets us to anywhere in Europe and then take the short-ish hop on separate tix. Anyone remember when that 148k sale was last fall/early winter?)

Thanks!