[Wien] interesting problem

[Zsolt Rak]

Dear wien2k users,

I' doing a supercell calculation and after adding spin orbit 
interaction, I've got this interesting message:
 

cycle 1     (Mon Dec 25 09:29:24 EST 2006)  (40/40 to go)

 >   lapw0       (09:29:24)  ABBRUCH: DIE EFG-MATRIX IST DIE NULLMATRIX !
 ABBRUCH: DIE EFG-MATRIX IST DIE NULLMATRIX !
49.932u 1.353s 0:51.39 99.7%    0+0k 0+0io 0pf+0w
 >   lapw1  -up          (09:30:15)

What is this about? Can anyone help me?

Thanks.
Zsolt