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Why am I getting an error with FRF when the equivalent DLOAD is fine?

I am performing frequency response on a large model. For a set of grid points, I want the response of every grid point due to unit forcing at each grid point dof. In the past, I have set up DLOAD cases for each unit force, but I then discovered that FRF does that exact thing. Recently, with a new model, I am getting a FATAL error when I use FRF that does not happen for the identical DLOAD case.
 
Specifically, if I run FRF with
FRFXIT1,3,115910
 
the .f06 file gives an unspecified FATAL ERROR and says
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
    GINO FILE     101 WAS LEFT OPEN AT PROGRAM TERMINATION.
 *** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
    GINO FILE     121 WAS LEFT OPEN AT PROGRAM TERMINATION.
 *** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
    GINO FILE     120 WAS LEFT OPEN AT PROGRAM TERMINATION.
 *** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
    GINO FILE     118 WAS LEFT OPEN AT PROGRAM TERMINATION.
 
The .log file says
 16:58:53 NSEXIT: EXIT(20)
 16:58:53 Analysis complete -20
 
However if I run with
DLOAD  200    1.0    1.0    141
RLOAD1 141    151                    6
DAREA  151    115910 3      1.0
 
TABLED1       6
            0.0    1.0  100.0   1.0    ENDT
 
there is no problem. I would like to understand this error and how to fix it.
 
Thanks.
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