As of December 1, 2020, Focal Point is retired and repurposed as a reference repository. We value the wealth of knowledge that's been shared here over the years. You'll continue to have access to this treasure trove of knowledge, for search purposes only. Moving forward, myibi is our community platform to learn, share, and collaborate. We have the same Focal Point forum categories in myibi, so you can continue to have all new conversations there. If you need access to myibi, contact us at email@example.com and provide your corporate email address, company, and name.
You have to remember that in Dialogue Manager, all variable are strings. To use Date Functions like DTPART, DATEADD, DATEMOV, etc., you have to use a smart date. This is done using DATECVT. Another way is to use DEFINE FUNCTION to create versions of these Date Functions. We use versions of DATEMOV, DATEADD and DATEDIF for use with Dialogue Manager. See the link below. One can do anything with these that they can do in TABLE.