Your problem is not that -tsspell- (SSC) is "not working", but that
you have failed to -tsset- properly.
The error message shows the problem. You have repeated time values
within one or more panels, so that panel identifier and time do not
uniquely identify observations. In addition to -tsset- documentation,
you might find this from a search
FAQ . . . . . . Dealing with reports of repeated time values within panel
. . . . . . . . . . . . . . . . . . . . . . . N. J. Cox and M. Mulcahy
12/05 How do I deal with a report of repeated time values
within panel?
http://www.stata.com/support/faqs/data-management/
repeated-time-values/
