I encounter this message often when merging data sets. It's just a warning, so may possibly be ignored. But to find out where it is occurring, use

options mprint;

before %treedisc

Arthur Tabachneck wrote:

> In attempting to test the treedisc.sas macro, for computing decision > trees, I encountered the following error: > > WARNING: Multiple lengths were specified for the BY variable SPLIT_ by > input data sets. This may cause unexpected results. > > I was using the example found at: > http://cda.mrs.umn.edu/~anderson/math3611/gopher/SAS/trees/treedisc.htm > > Is the example simply not compatible with the macro, or am I simply using > an outdated version of the macro? If it is the latter, I would be greatly > appreciative if someone would either email me the latest version, or > provide a link to it. > > Thanks in advance, > Art

-- Michael Friendly Email: friendly AT yorku DOT ca Professor, Psychology Dept. York University Voice: 416 736-5115 x66249 Fax: 416 736-5814 4700 Keele Street http://www.math.yorku.ca/SCS/friendly.html Toronto, ONT M3J 1P3 CANADA