To eliminate this message the last line of your SQL script should be a carriage return with no other characters (blanks included). 

For instance if you run this script in SQL*Plus you will get a "Input truncated to 14 characters" message because the last 
line of the script contains characters (in this case: set heading on):

set heading off
select count(*) from dba_tables;
set heading on

To fix this problem add an empty line after the set heading on command and don't add any spaces to that empty line.