Number of columns allowing NULLs exceeds limit

Item Value
SQLCODE -733
Constant SQLE_TOO_MANY_NULL_COLUMNS
SQLSTATE 23504
Sybase error code 233
ODBC 2 State 23000
ODBC 3 State 23000

Probable cause 

You attempted to create or modify a table definition such that the number of columns that allow nulls is now more than the limit on such columns. The limit is a function of database page size and is approximately 8*(page_size - 30).