Dateadd function error

[jim nowlin <jim_nowlin@NAVIGATORS.ORG>]

Brio product and version number:  SQR V4.3.4
Operating system and version number: True64 (Compaq) 5.0A
Database name and version number: Oracle 7.3.4.0.0

This is the first time I tried to use "dateadd". The code I'm using
follows:

  let $sunday = dateadd($parm-end-dt,'DAY',6)

I get the following error in the sqrlog:

Error on line 118:
   (SQR 4045) Function or operator 'dateadd' requires date argument.

Any ideas on what I'm doing wrong?

If I can get this to work, can I use a negitive number to subtract six
days?

Thanks for the help,
Jim Nowlin
jim_nowlin@navigators.org