connect the regions
 

hi, i have a pipe(circular cross section) with an elbow, i had to create pipe in global cylindrical coordinate system and then elbow in local toroidal coordinate system and i am done with the meshing part. when i checked the model for errors, i am getting an error # 74 saying: there are unconnected regions in the model. some one please help me how i can fix the problem. thanks in advance.

Re: connect the regions
 

Actually there are duplicate vertex...so just merge the vertex.

Re: connect the regions
 

if the cell size is different then create couples