After add/create new columns to an existing table which has data you noticed that activation process was executed without any errors however when checking object at database level, new fields does not have NOT NULL constraint set.
When checking database object in SE11 transaction you can see a similar behavior as sample below where field F3 does not have NOT NULL constraint set:
SAP NetWeaver 7.00 and higher
NULL, Values, Constrain, Table conversion, Flag, Marked, Checked, NOTNULL, DB object, Attribute, Append definition , KBA , BC-DWB-DIC-AC , Activation Prog., Conversion Prog., DB-Utility, MC, SPDD , Problem
About this pageThis is a preview of a SAP Knowledge Base Article. Click more to access the full version on SAP ONE Support launchpad (Login required).
Search for additional results
Visit SAP Support Portal's SAP Notes and KBA Search.