If a SQL script file has blank lines in between SQL statements one may see errors when executing the script in SQL*Plus so if one would like to ignore the blanklines in SQL*Plus one can ignore them by set blanklines on.

Example:
SQL> select object_name
2
SQL> from dba_objects;
SP2-0734: unknown command beginning “from dba_o…” – rest of line ignored.
SQL> set sqlblanklines on
SQL> select object_name
2
3 from dba_objects
4 where rownum < 3;

OBJECT_NAME
——————————————————————————–
ICOL$
I_USER1
— Disable blank lines in between SQL statements
SQL> set sqlblanklines off