FORTH Beginner Question.

[twoweims]

Forgive me if this has already been answered. I did attempt to search the forum but got no results.

I am just beginning to try to learn Forth on EMU71 for windows.
I have a bare bones real 71B but actual ROMs are made of unobtanium!

I have loaded the HP-41 Translator Pac and it seems to work fine.
I am able to switch between BASIC, FORTH, and HP-41 Modes.

I am trying to work through the examples in the "Starting-FORTH" Book.

I can execute built-in FORTH words but if i try to define a new word I get:
FTH ERR:Dictionary Full

The FTH41RAM file exists.
The "GROW" word seems to have no effect on the FTH41RAM File size (Should it?)

I am probably overlooking something very basic.

Thanks in advance for any assistance.