GNS3 :: 209-unable to start instance

[shipa]

I don't strongly know where should i ask this question, i consider this topic suit for it
i'm trying to learn using GNS3, but....

1) i've made the simple topology

ok.png

all right! save topology...

2)try to load saved topology and.... ERROR!

error.png

What does it mean??? Please, help me...

i've found the same problem in the Internet, but there someone have problems with paths to VMs, but my look right:
/home/shipa/Documents/computer_security_2/lab_2/debian_1.img
/home/shipa/Documents/computer_security_2/lab_2/debian_2.img
and parameters:
-name debian_1 -nographic -vnc :1
-name debian_2 -nographic -vnc :2

[shipa]

anyone have ideas about this?