An Attempt to attach an auto-named database Error

Question

\"An attempt to attach an auto-named database for file C:\\Users\\John\\documents\\visual studio 2010\\Projects\\PAS\\PAS\\bin\\Debug//PatAddSys.mdf failed. A database with

Answer 1

i think it might be very very late BUT

this string give me the above error

But if add |Data Directory| before database name then it work fine