RE: Change Invisibles: migrating from Xy 3.55 to 4.017

[Harry Binswanger hb@xxxxxxxx]

Carl writes:

>Next I'd change every instance of BC to BX and every corresponding XC to Q2.
>Blind execution of commands works a dramatic speed increase in most programs.
>
***BEWARE: Over the years I've repeatedly had difficulties using BX instead
of BC on ci commands (and even SEarch commands). I strongly advise NOT
making this change.

It's been so long since I resolved not to use BX/Q2 for these commands that
I'm a little foggy on what goes wrong--I would try to use them in loops and
I think it would miss some or not trip the error flag when it got to the
not-found state, and so couldn't exit loops. But I had the damndest time
debugging XPL programs until I went to BC/XC for se and ci. I use BX/Q2 for
all other commands.



Harry Binswanger
hb@xxxxxxxx