[plt-scheme] memory error

>This is weird.  You can try to divert the output someplace else and
>see what's the difference.
>  
>
I'm using mzscheme 299.200, WIN32. It's a callback on a "clicked" signal 
in mzgtk2.
I'm writing the output (about 65K) to stdout. Should I try write it to a 
file?