Problem with Date(days()) functions

[Joseph Northrop]

First of all, let me thank everyone for the responses
to my date problem.  

Upon looking at my original program again, I find
that I made an error in my original post from
yesterday.
The date that I am trying to manipulate is being
stored as a numeric 6.  Our client stores all of 
their dates as numeric 6. 

For the purpose of this message, I will hard code a
num*6 date into my example:

DEFINE DT NUM*6 = 000101
DEFINE ND NUM*6 = DATE(DAYS(DT)-4)

I have tried various fixes for this, and the latest
one was in the dictionary, I set INPUT CENTURY
19 FROM 20 and CENTURY EXCLUDED DEFAULT 20.

This works fine for all dates except for when the 
subtraction of 4 days from the date results in a
date in a different century than the input date.  
(such as 000101) I get a 0 for ND and a data
conversion error.  When I set the dictionary
to CENTURY INCLUDED DEFAULT 20 with
INPUT CENTURY 19 FROM 20, I get correct
dates with a 4 digit year (8 digit total) from a
field that is supposed to be a numeric 6!   Yes,
we can convert it to CHAR and lop off the
century, but we were hoping not to have to do
that...we have a lot of programs effected by
this.  Plus we are concerned about what else
this may effect that we aren't aware of.

I'm not sure where to go with this.  Any help
would be appreciated.
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