Martin Sch?necker wrote:
> Hi,
>
> judging from what the maual says about derivabbrev, I think it should
> affect only the way expressions are displayed, and not affect calculations.
>
It does affect only the way expressions are displayed. You encountered
a bug in the display program.
The program should display
aa
bb bb bb bb bb bb .... bb
where there is a string of length cc of the symbol bb.
So it has to count from cc down to 0. Since cc is not an integer, there
is a problem.
Now how to fix this? What would you like to see? perhaps
aa
<cc>
bb
or an error message?
or ??
The code is open for inspection and repair.
RJF