Dear Aptech representative,
In Gauss 17, the unique procedures seems to do strange things. Consider the following programme:
new;
let string XVAR1 = x1 x2 x3 x4 ;
let string XVAR2 = X2;
xvar1=unique(xvar1);
v=unique(Xvar1 $| Xvar2 );
$v';
end;
It should return a string array with x1 x2 x3 x4. However, on my machine (17.0.2, build 4321), it returns x1 x2 x4 . Thus, somehow x3 disappeared. Surprisingly, this does not happen if 'unique' is used only once. It did also not happen in G16.
