Loading Clob and Blob data using DBMS_LOB

Question

I am loading some data into a table that has five columns, two of which are defined as BLOB and CLOB respectively. I get the following errors after the pl/sql procedure that loads it has completed running :
ERROR:ORA-21560: argument 3 is null,
invalid, or out of range
ERROR:ORA-22297: warning: Open LOBs exist
at transaction commit time.
The following is the outline of the code that loads the table:
CREATE OR REPLACE PROCEDURE load_data(dir,seq_val,file_name,
details, etc <== all these are passed in) IS
dest_loc BLOB;
src_loc BFILE;
Amount INTEGER;
new_dir string(1000);
new_file string(1000);
BEGIN
new_dir := ''||dir||'';
new_file := ''||file_name||'';
src_loc := BFileName(new_dir,new_file);
Amount := dbms_lob.getlength(src_loc);
insert into table A
(id
,ver
,ver
,fil_nm <== This field is a BLOB
,details <== This Field is a CLOB
values
(seq_val
,1
,version
,empty_blob()
,detailed_infor
--dbms_output.put_line(Amount);
SELECT fil_nm INTO dest_loc FROM table A WHERE id = seq_val FOR UPDATE;
/* Opening the LOB is mandatory: */
--dbms_output.put_line('IN SELECT...');
DBMS_LOB.OPEN(src_loc, DBMS_LOB.LOB_READONLY);
/* Opening the LOB is optional: */
DBMS_LOB.OPEN(dest_loc, DBMS_LOB.LOB_READWRITE);
DBMS_LOB.LOADFROMFILE(dest_loc, src_loc, Amount);
/* Closing the LOB is mandatory if you have opened it: */
DBMS_LOB.CLOSE(dest_loc);
DBMS_LOB.CLOSE(src_loc);
--dbms_output.put_line('After SELECT...');
COMMIT;
END
Any feedback would be really appreciated. Thanks.

Answer 1

I assume thats when the ORA-21560: argument 3 is null, invalid, or out of range error occurs. I'm also wondering why and what the other error means saying LOBs are open during transaction commit time. The data is coming from an xml file that is in the following format.
- <NAME>
<FIL_NM>TEST.PDF</FIL_NM>
<VER>2</VER>
<DETAILS>xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxyyyyyyyyyyyyyyyyyyzzzzzzzzzmmmmmmsusssuitttttretc</DETAILS>
</REPORT>
<NAME/>
So what this procedure is doing is opening the pdf and loading the data into the BLOB. I just can't understand what is causing those errors.