Make sure that when you sweep with the solsh190s, the element is oriented correctly so the shell thickness is defined properly. If you look up help,190 it will show you the node order that defines the thickness direction.
Here's a quick example if you still need one:
finish
/clear
/prep7
blc4,0,0,1,1,.125
et,1,190
lsel,s,loc,z,.01,.124
lesize,all,,,1
vsweep,all
/view,1,1,1,1
eplo
If your geometry is complex, you may need to do some slicing and dicing to get it to work.
Hope this helps,
Doug