sqlplus and Sqldevloper ORA-00911

Hi,

On 11.2.0.4 on AIX

I have a file with  thousands of lines like this:

update table set col1='XXX'; commit;

When I run it in sqlplus , I receive:

ERROR at line 1:

ORA-00911: invalid character

But when I paste the content of file in sqldevloper it works fine and I have:

line updated

commit complete.

Do you have any explantion please?

Thank you.