Error while execution the following sql:BULK INSERT

While upgrading data from 3.0 to 4.0, we need to use a tool AxDbUpgrade.exe, I was getting error while running the tool on bulk insert, the reason was that I was running the tool on the server where my AOS was installed, however the database was not able to access the local path of AOS, so I created a folder on my DB server and shared it and issue was resolved.