Hi All,
Another SPR has been reported for SW2020 SP1 that affects the Drawings class. Exercise 4, Removed Section, is not behaving correctly in this service pack. SPR #1169430 has been assigned to this issue.
If you want to work around the problem, you can edit the sweep feature for the model and turn off the option to Merge tangent faces. This will result in some danging dimensions in the model, but the Removed Section feature will work. If this SPR is not addressed in the next service pack, I will prepare a new example model and re-release the training file set.
Thanks to Phillip Burgstaller from Planetsoftware GmbH for reporting this issue!
-Rebekah Hanks
Solidworks