st: Re: error in -vanelteren- (1 group found, 2 required)

["Joseph Coveney" <stajc2@gmail.com>]

I am getting an error when running the user-written program -valelteren-
(written by J. Coveney, downloaded from ssc).

The error message states that 1 group is found when 2 are required.  Clearly
there are 2 groups in the specified variable.

I emailed the author of code at two different email addresses but he's so
far non-responsive. 

Does anyone else experience this error? I am running Stata v 13.1

--------------------------------------------------------------------------------

-vanelteren- does a within-stratum test between the two groups of the of the
-by- variable, and so you'll need at least one observation in each of the -by-
groups for each stratum for the command to work.  As Red Owl pointed out, the
first two repair record strata have no observations in the Foreign-automobile
groups.  (See below.)

I just checked my e-mail accounts and there is no e-mail from you anywhere
(other than via the Stata List server), even in the junk-mail folders.  You
might want to re-check whether yours to see whether it bounced for some reason.

Joseph Coveney

. sysuse auto
(1978 Automobile Data)

. tabulate rep78 foreign

    Repair |
    Record |       Car type
      1978 |  Domestic    Foreign |     Total
-----------+----------------------+----------
         1 |         2          0 |         2 
         2 |         8          0 |         8 
         3 |        27          3 |        30 
         4 |         9          9 |        18 
         5 |         2          9 |        11 
-----------+----------------------+----------
     Total |        48         21 |        69 

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/