error 13 File Not Found - migrating from MF COBOL to Visual Cobol(Native)

Hi,

i remember this error from a year ago, during test of MF cobol for Eclipse.

I tried to find solution today, no luck with google, our forum or KB. So there it is, Use case;

****cobol code:

FILE-CONTROL.
SELECT DDEING
ASSIGN TO AEING.
*was UT-S-DDEING
SELECT DDBERKA
ASSIGN TO ABERKA.
*was UT-S-DDBERKA
*****
*****
DATA DIVISION.
FILE SECTION.
*
FD DDEING
RECORDING MODE F
LABEL RECORD STANDARD
BLOCK 0 RECORDS.
01 DDEING-REC.
05 DDEING-ELEM PIC X(2).
05 DDEING-REST PIC X(498).
FD DDBERKA
RECORDING MODE F
BLOCK 0 RECORDS.

...

OPEN INPUT DDEING                   <-- error 13 file not found
OPEN OUTPUT DDBERKA

I have following additional directives(error occures also without additional directives) ;

DIALECT(ENTCOBOL) INITCALL"ORASQL8" ASSIGN "EXTERNAL" copyext"cpy" hostarithmetic PERFORM-TYPE"OSVS" signfixup IDXFORMAT(8) nolist

and following env. var.; AEING ->  "G:\Entwicklung\mfes\TPO\Data\LEM\TS64004.QUACON.DDZMV.DAT"

File resides in (mounted) shared disk.

Thanks,

Alex