Hello everybody

I am trying to merge 2 tables using the command merge 1:1 or 1:m or m:1 or m:n, but the same problem arizes:

(pathsplit() in lmatabase, compiled by Stata 16.1, is too new to be run by this version
of Stata and so was ignored)
fullfilename(): 3499 pathsplit() not found
<istmt>: - function returned error


I do not know another way how to merge just 2 small tables and it is crucial