Nonlinear spring modification in Abaqus 2017 input file

"[email protected] [Abaqus]" <[email protected]>
Newsgroups gmane.comp.mathematics.abaqus.user
Message-ID <[email protected]>
Hi, I am a researcher who is a novice for ABAQUS/CAE.
 My purpose is to model horizontal non-linear spring in between base and concrete slab.
 So, first I modelled horizontal spring element in between the slab and soil base via ABAQUS/CAE and it appeared in the input file as below:
 ------------------------------------------------------------------------------------------------------------------
 *Spring, elset="Horizontal Spring-spring"
2
500.
*Element, type=Spring1, elset="Horizontal Spring-spring"
33121, 2
33122, 3
33123, 5
 ---------------------------------------------------------------------------------------------------------------------
 And to modify it into nonlinear spring, I add nonlinear and dependencies command beside elset in "Spring line and add nonlinear relationship between force and relative displacement as follows:
 ------------------------------------------------------------------------------------------------------------------
 *Spring, elset="Horizontal Spring-spring", NONLINEAR, DEPENDENCIES=1
2
-6480000., -0.01
-3240000., -0.005
0., 0.
3240000., 0.005
6480000., 0.01
*Element, type=Spring1, elset="Horizontal Spring-spring"
33121, 2
33122, 3
33123, 5
 ------------------------------------------------------------------------------------------------------------------
 However, when I tried to import the input file to ABAQUS/CAE 2017, it showed the error message as such:
 WARNING: The following keywords/parameters are not yet supported by the input file reader:
------------------------------------------------------------------------------------------------------------
*PREPRINT
*SPRING, DEPENDENCIES, NONLINEAR
 ------------------------------------------------------------------------------------------------------------
 And the imported model seemed without horizontal springs which are supposed to be nonlinear.

 I tried several ways but results looked same.

 Would you please let me know why Abaqus input file reader cannot read nonlinear command modified in the input file even though those commands are described in the manual?
 Or just my modification is wrong?
 Thank you,
 Hoonill
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