how to troubleshoot "could not open the sketch" error

Using Arduino IDE 1.x
1

hi friends, i received .ino file through email from my friend. while open the file i received following error message. how i can troubleshoot

err1.jpg

error.jpg
error.jpg734×724 195 KB

2

Have you tried removing (1) from both the directory name and the file name?

3

thank you sir. its working now

4