[MiKTeX] .eps files not rendered in YAP

[Masoud S. <salehi@ECE.NEU.EDU>]

Hi;

It is a couple of days that YAP refuses rendering .eps files with the error 
message:

====================
While reading gs_dbt_e.ps:
Error: /undefined in --get--
Operand stack:
    (gs_fntem.ps)   1   FontEmulationProcs   encodingnames 
--nostringval--   --nostringval--   StandardEncoding   --nostringval-- 
ISOLatin1Encoding   --nostringval--   SymbolEncoding   --nostringval-- 
DingbatsEncoding   --nostringval--   ISOLatin1Encoding   --nostringval-- 
StandardEncoding   --nostringval--   SymbolEncoding   --nostringval-- 
DingbatsEncoding   256.vec   --dict:4/16(G)--   256.vec
Execution stack:
    %interp_exit   --nostringval--   --nostringval--   --nostringval-- 
%array_continue   --nostringval--   --nostringval--   false   1 
%stopped_push   --nostringval--   17   5   %oparray_pop   --nostringval-- 
--nostringval--   --dict:17/21(ro)(G)--   --dict:24/25(G)-- 
--nostringval--   32   %dict_continue   --nostringval--   --nostringval-- 
--nostringval--
Dictionary stack:
    --dict:931/1123(G)--   --dict:0/20(G)--   --dict:64/200(L)-- 
--dict:931/1123(G)--   --dict:10/10(G)--
Current allocation mode is global
Current file position is 6173
=====================

I have done some changes to miktex recently, mostly making it work with 
mathtime fonts. I do not recall having changed anything in relation to 
ghostscript. In particular, in the Options>Postscript I have 
c:\texmf\miktex\bin\mgs.exe as postscript interpreter and "ignore 
postscript specials" is not checked.

Thanks for any hints

Masoud