Hi Jeff,

VFP needs 554 bytes per stacksize to save some STACKINFO data, for example,
stacksize=65000,
it needs 554 * 65000 = 36010000, it's about 36MB.

Please refer to:
http://baiyujia.com/vfpdocuments/f_vfp9fix234.asp
[NEW.....] VFP 9.0 FIX - SYS(9116) RETURNS THE STRUCTURE NESTING LEVEL

In Visual FoxPro 9.0 and earlier versions, the default value is 128 for the STACKSIZE term in the configuration file,
so the Maximum # of nested structured programming commands is 384 (0x42 * 0x80 / 0x16 = 0x180 = 384).
In Visual FoxPro Advanced, the default value is 2048 for the STACKSIZE term in the configuration file,
so the Maximum # of nested structured programming commands is 6144 (0x42 * 0x800 / 0x16 = 0x1800 = 6144).

Best regards,
Chen