When I Checked the free memory in the 16 and the 17 version it had about 19.3 MB free, but in the 18 and 19 version it only had 6-8 MB so there is no mach space to work.
I thought about making page file (using in the memory stick).
Thanks for pointing that out. It was one thing I was worried about when changing the way lua is loaded into user memory. I will have a look and see if we can improve the amount of memory available in future versions.