If, during the delay (see below), I make a window other than TCMD the foreground window, I get
The window is moved and sized but not activated (no surprise since MS has really screwed up foreground/focus in Win7). But the (non-)error message seems inappropriate.
v:\> delay 5 & activate "TC 14.0 - 14.02  v:\" /pos=0,0,800,600 TCC: (Sys) The operation completed successfully. "TC 14.0 - 14.02  v:\"