Size() error

[queenidog]

When trying to run the processing program, I get an error saying not to use variables in the "size" parameter. It seems to be telling me about PROGRAM Size, but the size() command line seems to be configuring the size of the display. Is "size" a protected word that should not be used in this context?

The command in the program, under Setup() is
size(SIDE_LENGTH, SIDE_LENGTH/2, P2D);