render layer saving script assumed scriptsdir existed.

apply def script assumed the mesh had all the objects vertex groups.

release/scripts/object_apply_def.py

@@ -77,7 +77,11 @@ def copy_vgroups(source_ob, target_ob):
 		for vgroupname in vgroups:
 			target_me.addVertGroup(vgroupname)
 			if len(target_me.verts) == len(source_me.verts):
+				try: # in rare cases this can raise an 'no deform groups assigned to mesh' error
 					vlist = source_me.getVertsFromGroup(vgroupname, True)
+				except:
+					vlist = []
+				
 				try:
 					for vpair in vlist:
 						target_me.assignVertsToGroup(vgroupname, [vpair[0]], vpair[1], ADD)

release/scripts/render_save_layers.py

@@ -47,8 +47,12 @@ rend = sce.render
 
 # default filename: theme's name + '_theme.py' in user's scripts dir:
 default_fname = Blender.Get("scriptsdir")
-default_fname = Blender.sys.join(default_fname, sce.name + '_renderlayer.py')
-default_fname = default_fname.replace(' ','_')
+if not default_fname:
+	default_fname = Blender.Get("uscriptsdir")
+
+if default_fname:
+	default_fname = Blender.sys.join(default_fname, sce.name + '_renderlayer.py')
+	default_fname = default_fname.replace(' ','_')
 
 def write_renderlayers(filename):
 	"Write the current renderlayer as a bpython script"