求助：关于adams宏的问题

phillipsesco

我想用adams宏命令创建几个球，资料中的宏命令如下
undo begin
default coordinate_system default_coordinate_system=.model_1
for variable_name=t start=1 end=5
part create rigid_body name_and_position part_name=(eval("part"//RTOI(t)))
adams_id=(eval(t+1))
part modify rigid_body mass_properties part_name=(eval("part"//RTOI(t)))
material=.model_1.steel
part attributes part_name=(eval("part"//RTOI(t))) color=blue name_vis=off
marker create marker=(eval("mar"//RTOI(t)))&
adams_id=(eval(t+1))&
location=(eval(0.1*(t-0.5))),0,0&
orientation=0,0,0
geometry create shape ellipsoid&
ellipsoid_name=(eval("ellipsoid"//RTOI(t)))&
x_scale_factor=(2*(0.05))&
y_scale_factor=(2*(0.05))&
z_scale_factor=(2*(0.05))&
center_marker=(eval("mar"//RTOI(t)))
end
可是老是出现
ERROR:  ---------------------------------------------------------------------
ERROR:  Error detected on line number 5, character 9 of the macro '.MACRO_1'.
ERROR:  'adams_id' is not a valid entity.
ERROR:  The command was not executed.
ERROR:  +1>> adams_id=(eval(t+1))
ERROR:  ---------------------------------------------------------------------
! +1>> part modify rigid_body mass_properties part_name=(eval("part"//RTOI(t)))
ERROR:  ---------------------------------------------------------------------
ERROR:  Error detected on line number 7, character 10 of the macro '.MACRO_1'.
ERROR:  '=' is not a valid keyword. You may have misspelled
ERROR:  the keyword or you may be missing a continuation character(&)
ERROR:  on the previous line.
ERROR:  The command was not executed.
ERROR:  +1>> material=.model_1.steel
ERROR:  ---------------------------------------------------------------------
! +1>> part attributes part_name=(eval("part"//RTOI(t))) color=blue name_vis=off
! +1>> marker create marker=(eval("mar"//RTOI(t)))&
! +1&> adams_id=(eval(t+1))&
! +1&> location=(eval(0.1*(t-0.5))),0,0&
! +1&> orientation=0,0,0
! +1>> geometry create shape ellipsoid&
! +1&> ellipsoid_name=(eval("ellipsoid"//RTOI(t)))&
! +1&> x_scale_factor=(2*(0.05))&
! +1&> y_scale_factor=(2*(0.05))&
! +1&> z_scale_factor=(2*(0.05))&
! +1&> center_marker=(eval("mar"//RTOI(t)))
! +1>> end
求高手指点迷团！