Preconditioner dcsrilu0 has returned the ERROR code -106

hi, all, Please give me some suggestions about error: Preconditioner dcsrilu0 has returned the ERROR code -106.

I tried to use ilu + gmres to solve Ax=b.

Here, A is like

2 -1

  -1 2 -1

      -1  2 -1

and so on. I have attached code. Thanks.