CLUAConsole trouble

I can't get the following console command to work:
C:Eval('DisplayStringPointLog(1,[1200.560])')
It is always triggering the following error message:

Action Errors:: Warning: Too many parameters:DisplayStringPointLog(1,[1200.560]) Line Number:1

Which is odd since function signature in ACTION.IDS contains two parameter definitions:

408 DisplayStringPointLog(I:Strref*,P:Location*)

Did I make a mistake in the line above or is this a game bug? (Btw, the same line in a regular game script executes flawlessly.)