Hello,I am new to Progecad but am fairly familiar with Autocad.  I started with Autocad 10 and the last version I worked with was 2017.I have been trying to use the slice command of Progecad 2026 to slice a 3D object using a circle as the slicing plane.I don't know what I am doing wrong...I can't get it to work.It works fine if I use a line as the slicing plane but it will not work with a circle.my 3D solid is a + shape with a thickness of 0.05.There are concentric circles that I am trying to use as slicing planes.I tried a simple 2D circle it lets me select it then ask me which side to keep (i chose Both) and then nothing.  The command terminates I am back to command prompt and no slice was done. If I try to convert the circle to a region or solid, it wont let me select it as a slicing plane.That used to work with Autocad.What am I doing wrong?