Venu 2 (CIQ 4.0) BufferedBitmap - Error: Symbol Not Found Error

Just tried to compile my Pong Watchface for Venu 2 in the SDK and run it on the emulator.

Got:

Error: Symbol Not Found Error

Details: Failed invoking <symbol>

for the line

        offscreenBuffer = new Graphics.BufferedBitmap(

                {:width=>x2,

                :height=>yM,

                :palette=>[Graphics.COLOR_TRANSPARENT,

                          bgColor]} );       // create an off-screen buffer with a palette of TWO colors

It was ok for many months ago for older watches.

Also have tried different variations of options for Graphics.BufferedBitmap - no luck.

Please advice.