upgrade to Sage 100 Premium (SQL) problem with missing NULL values

Hello,

We just upgraded from an older version of MAS 90 / Providex to Sage 2023 100 Premium. 

It appears that all of the NULL values in our company tables have been converted to empty data, with the exception maybe of the date fields.

This is causing problems with a bunch of custom applications that run off of our Sage data.

Has anyone else experienced this? Is there a fix?

thanks, Kris