So, you started working on your modification in Dynamics NAV, and after adding a few new fields, you get hit by an error meesage: The active fields in a record cannot take up more than 4000 bytes. The active fields in the table take up to 4063 bytes. You must reduce the number or the length of the active fields. What?!
It seems (according to Dynamics NAV Application Designer’s Guide – and it’s also application to Dynamics NAV 2009 R2), that the maximum record size in Dynamics NAV is 4KB. Yup, that’s it… only 4 KB!