Try to paste (after some changes to fit your /scratch location) the following lines right after the NASTRAN statement of your input file:
$
INIT DBALL LOGICAL=(DBALL1(300000),DBALL2(300000),DBALL3(300000),
DBALL4(300000),DBALL5(300000),DBALL6(300000),
DBALL7(300000),DBALL8(300000),DBALL9(300000),
DBALL10(300000),DBALL11(300000),DBALL12(300000),
DBALL13(300000),DBALL14(300000),DBALL15(300000),
DBALL16(300000),DBALL17(300000),DBALL18(300000),
DBALL19(300000))
$
ASSIGN DBALL1='/scratch/scrfile.DB1'
ASSIGN DBALL2='/scratch/scrfile.DB2'
ASSIGN DBALL3='/scratch/scrfile.DB3'
ASSIGN DBALL4='/scratch/scrfile.DB4'
ASSIGN DBALL5='/scratch/scrfile.DB5'
ASSIGN DBALL6='/scratch/scrfile.DB6'
ASSIGN DBALL7='/scratch/scrfile.DB7'
ASSIGN DBALL8='/scratch/scrfile.DB8'
ASSIGN DBALL9='/scratch/scrfile.DB9'
ASSIGN DBALL10='/scratch/scrfile.DB10'
ASSIGN DBALL11='/scratch/scrfile.DB11'
ASSIGN DBALL12='/scratch/scrfile.DB12'
ASSIGN DBALL13='/scratch/scrfile.DB13'
ASSIGN DBALL14='/scratch/scrfile.DB14'
ASSIGN DBALL15='/scratch/scrfile.DB15'
ASSIGN DBALL16='/scratch/scrfile.DB16'
ASSIGN DBALL17='/scratch/scrfile.DB17'
ASSIGN DBALL18='/scratch/scrfile.DB18'
ASSIGN DBALL19='/scratch/scrfile.DB19'
$
$ ------========--------
$
INIT SCRATCH LOGICAL=(SCRA1(300000),SCRA2(300000),SCRA3(300000),
SCRA4(300000),SCRA5(300000),SCRA6(300000),
SCRA7(300000),SCRA8(300000),SCRA9(300000)),
SCR300=(SCR1(300000),SCR2(300000),SCR3(300000),
SCR4(300000),SCR5(300000),SCR6(300000),
SCR7(300000),SCR8(300000),SCR9(300000))
$
ASSIGN SCRA1='/scratch/scrfile.SCRA1'
ASSIGN SCRA2='/scratch/scrfile.SCRA2'
ASSIGN SCRA3='/scratch/scrfile.SCRA3'
ASSIGN SCRA4='/scratch/scrfile.SCRA4'
ASSIGN SCRA5='/scratch/scrfile.SCRA5'
ASSIGN SCRA6='/scratch/scrfile.SCRA6'
ASSIGN SCRA7='/scratch/scrfile.SCRA7'
ASSIGN SCRA8='/scratch/scrfile.SCRA8'
ASSIGN SCRA9='/scratch/scrfile.SCRA9'
$
ASSIGN SCR1='/scratch/scrfile.SCR1'
ASSIGN SCR2='/scratch/scrfile.SCR2'
ASSIGN SCR3='/scratch/scrfile.SCR3'
ASSIGN SCR4='/scratch/scrfile.SCR4'
ASSIGN SCR5='/scratch/scrfile.SCR5'
ASSIGN SCR6='/scratch/scrfile.SCR6'
ASSIGN SCR7='/scratch/scrfile.SCR7'
ASSIGN SCR8='/scratch/scrfile.SCR8'
ASSIGN SCR9='/scratch/scrfile.SCR9'
$
I think it should work this way.
Let me know.
Cheers
'Ability is 10% inspiration and 90% perspiration.'