Error "MultiZone found free block in swept body" on meshing the fluid domain on JB
 

I am meshing a fluid domain of journal bearing using FLUENT. In the first and second pictures, I succeeded and got a good meshing result. but when I combine figure 1 and 2 (there is an inlet and slip region in 1 geometry) like in figure 3, the meshing becomes error with comments ("MultiZone found free block in swept body" and "A mesh could not be generated using the current meshing options and settings "). I've tried to decrease the element size, but the result is still error. I also have changed the method to hex dominant and it worked but the skewness is 1 (really high).

does anyone have any suggestions for this problem? I think I need to have a Hexa element.

p.s. : I design this geometry in Solidworks and just import it in design modeler. I use "wrap" feature to draw the inlet and slip region. and all of geometries have the same meshing condition as attached in figure 4https://imgur.com/f69FkFV
https://imgur.com/SL3Q7n5
https://imgur.com/NemmjW0
https://imgur.com/GN9NPfu