Hello
I used to install SLES12 SP5 with autoyast and now I try to do the same with SLES15 SP4 but met some difficulties.
For my SLES12 deployment, I skipped the partitioning part and moved it into a script during the autoyast pre-script phasis.
For SLES15, the installation fails on this partitioning skip 
Is it mandatory now ?
Using a script is easier for me as I have some entries in the boot menu, each one asking for a different partitioning (and also, it depends on disk’s size, growing or not some partitions, etc…)