adjustrcspline error

I'm trying to fit an stcox model with cubic splines to see the association between mortality and ratiopasit where ratiopasit is the ratio of PA (mins) and sitting time (hours).When I use the adjustrcspline command I get an error.

mkspline2 ssratiopasit =ratiopasit, cubic nknots (5) displayknots
mat ratiopasitknots=r(knots)
matrix list ratiopasitknots

ratiopasitknots[1,5]
knot1 knot2 knot3 knot4 knot5
ratiopasit 0 1.5155344 4.496788 10.675714 35.928143

stcox ssratiopasit1 ssratiopasit2 ssratiopasit3 ssratiopasit4 drage_05 i.sex_05 i.gq5_edu_05_recoded i.smokstat_05recoded i.gq3_marr__05_recoded i.no_comorbid_recoded waist_05
-------------------------------------------------------------------------------------------
_t | Haz. ratio Std. err. z P>|z| [95% conf. interval]
--------------------------+----------------------------------------------------------------
ssratiopasit1 | .8297227 .0597145 -2.59 0.009 .7205641 .9554178
ssratiopasit2 | 1609080 1.18e+07 1.94 0.052 .8802037 2.94e+12
ssratiopasit3 | 1.96e-10 2.35e-09 -1.86 0.062 1.23e-20 3.144156
ssratiopasit4 | 4733.167 24257.47 1.65 0.099 .2054684 1.09e+08
drage_05 | 1.128093 .0040805 33.32 0.000 1.120124 1.136119
|
sex_05 |
female | .6823007 .0531652 -4.91 0.000 .5856657 .7948805
|
gq5_edu_05_recoded |
high school or more | .9878815 .0885629 -0.14 0.892 .8286959 1.177645
|
smokstat_05recoded |
ex-smoker | .4832277 .0583604 -6.02 0.000 .3813734 .6122845
non-smoker | .4035807 .0482261 -7.59 0.000 .3193122 .5100882
unknown category/missing | .4148576 .0792575 -4.61 0.000 .2852851 .6032801
|
2.gq3_marr__05_recoded | 1.289657 .0951568 3.45 0.001 1.116011 1.490321
|
no_comorbid_recoded |
1 | 1.227457 .1227486 2.05 0.040 1.008984 1.493236
2 | 1.45518 .1514774 3.60 0.000 1.186617 1.784526
3 | 1.782304 .1993574 5.17 0.000 1.431435 2.219176
|
waist_05 | 1.005195 .0028721 1.81 0.070 .9995814 1.01084
-------------------------------------------------------------------------------------------

. adjustrcspline

all variables created in the last call to mkspline2 must be
independent variables in the last estimation command
r(198);

I've looked for this error on Statalist. Since the function (adjustrcspline) is calling values from e() estimated from the equation, these matrices should not be empty.
. matlist e(b)

| 1b. 2.
| ssratio~1 ssratio~2 ssratio~3 ssratio~4 drage_05 sex_05 sex_05
-------------+-----------------------------------------------------------------------------
y1 | -.1866637 14.29117 -22.35132 8.46235 .1205287 0 -.3822848

| 1b. 2. 1b. 2. 3. 4. 1b.
| gq5_edu~d gq5_edu~d smoksta~d smoksta~d smoksta~d smoksta~d gq3_mar~d
-------------+-----------------------------------------------------------------------------
y1 | 0 -.0121925 0 -.7272673 -.9073788 -.8798199 0

| 2. 0b. 1. 2. 3.
| gq3_mar~d no_com~ed no_com~ed no_com~ed no_com~ed waist_05
-------------+------------------------------------------------------------------
y1 | .2543762 0 .2049448 .3751297 .5779068 .0051814


Can someone shed light on why do I still get this error. Thanks in advance.