File opening error message in Shared folder

Sometimes, when you try to open a file in VirtualBox, from shared folder, you might get message:

The specified path does not exist.
Check the path and then try again.

It is somehow hard to understand to which files that happen, but there are some solutions:

Method #1

The first remedy is to rename the file just to several letters, and re-try to open.

Method #2

Second remedy is to copy/move that file from shared folder to desktop (or anywhere) and re-try to open.