issues in add_block in matlab

I am using my own library. My Library Name is "MTOR Library". I am trying to add a inport block which is in the library. My code is like this :

"add_block('MTOR Library/Documentation/Inport','tempmdl/In001')"

But it throws an error:

??? There is no block named 'MTOR Library/Documentation/Inport'.

I removed the space in between MTOR and Library. But it's not working