st: merge command

["Ziad El-Khatib" <Ziad.El-Khatib@ki.se>]

Hi!
I wrote merge command in do file and always run it without problem.
Today i got strange message

_merge invalid name
r(198);

The command is pasted below

joinby studyid using "C:\Documents and Settings\Administrator\My
Documents\Ziad_files\table01_080716.dta",_merge(_merge)


Any tips?
Thank you and best regards
ziad
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