Dear Forum Members,

I'm using the user-written - stpm2 - written by Royston and Lambert. The commands are also available in the book Flexible Parametric Survival Analysis Using Stata.

Precisely at the page 152, the authors recommend to install the ado file named str2d in order to get the D statistics (for discrimination) as well as the model's R-squared.

I installed the ado file without problems, and checked its help files. So far, so good.

However, if I try to reproduce the same command line shown at page 152 (with the freely available rott2 dataset), I get this error message:

Code:
. xi: stpm2 enodes_1 i.size grade pr_1 chemo hormon age, scale(odds) df(2)
i.size            _Isize_1-3          (naturally coded; _Isize_1 omitted)

Iteration 0:   log likelihood =  -3344.467  
Iteration 1:   log likelihood = -3330.7033  
Iteration 2:   log likelihood = -3330.6376  
Iteration 3:   log likelihood = -3330.6375  

Log likelihood = -3330.6375                     Number of obs     =      2,982

------------------------------------------------------------------------------
             |      Coef.   Std. Err.      z    P>|z|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
xb           |
    enodes_1 |  -2.469988   .1262644   -19.56   0.000    -2.717462   -2.222515
    _Isize_2 |   .3873098   .0786168     4.93   0.000     .2332237    .5413958
    _Isize_3 |   .6630704   .1288065     5.15   0.000     .4106143    .9155265
       grade |   .4909539   .0853156     5.75   0.000     .3237384    .6581693
        pr_1 |  -.0831007   .0164349    -5.06   0.000    -.1153125   -.0508888
       chemo |  -.7075086    .102732    -6.89   0.000    -.9088597   -.5061576
      hormon |  -.6668108   .1200258    -5.56   0.000     -.902057   -.4315647
         age |  -.0190175   .0031803    -5.98   0.000    -.0252507   -.0127843
       _rcs1 |   1.287639   .0292011    44.10   0.000     1.230406    1.344872
       _rcs2 |   .2205794   .0208198    10.59   0.000     .1797733    .2613854
       _cons |    .885118   .3346087     2.65   0.008     .2292969    1.540939
------------------------------------------------------------------------------

. xi: str2d stpm2 enodes_1 i.size grade pr_1 chemo hormon age, scale(odds) df(2)
i.size            _Isize_1-3          (naturally coded; _Isize_1 omitted)
unsupported or unrecognised command, stpm2
r(198);
I checked the book's errata, I changed the dataset, I "setted" the version to 11.0 (mine is 15.1) and I also tested the command without the xi: prefix.

To no avail.

One thing is for sure: the command stpm is supported (since I could perform the survival analysis). Also, the str2d was correctly downloaded (since its help file worked perfectly).

I wonder whether you can help me to solve this issue.

Thanks in advance