Problems with blueprint

I have just tried to make a new blueprint of a block of flats and each time it does not include the blocks all the objects and PNB are included just no blocks. I have made this blueprint before and had no problem but I had not completed the full block of flats hence wanting to make a new blueprint which included all components.
Am I doing something wrong? Can somebody please help?

I have since restarted my computer and also tried to blueprint only half the building and have the same problem.

I forgot to say I play SP and creative

More information. I made a blueprint yesterday of a push bike which did not include blocks. I just went in and did it again but included the blocks underneath. Again when using the blueprint the blocks did not show. What is going on?

I am sorry to have bothered you, I had not noticed the boxes for blocks and terraine. I feel so stupid, but many thanks for your info. It works now. Again sorry.