_CBR function crashes controller

On p. 159 of the manual, it lists the _CBR as the short version of the _BLRCNTR command, and also mentions _BLCOUNTER at the top of the page.

_BLRCNTR is not reconginzed by the script compiler - when you enter it into the code, it does no turn purple.
The short version, _CBR, is recognized, but crashes the controller.

A script with a single line getvalue (_CBR) behaves as follows: you press "Run" to run the script, and Roborun says "controller lost" then the controller is automatically found and it says "controller found, load configuration?" Once reloaded, if you run the script again, the same thing happens again. I tried two lines: getvalue (_CB) and then getvalue (_CBR), and the same thing happens.

I am running V1.5 RCB500 10/01/2015. Is it a bug or am I doing something wrong?