Problem uploading multibyte CSV file

Question

I apologize, this topic has been addressed several times, but I still can't find the solution.
I have multibyte CSV files (extract from BI) : Excel says "Unicode txt" and when I save them from Excel in "Text CSV", they get half the size on the disk.
here is the piece of code where the uploaded file get converted from blob to clob then to varchar2 (CSV Util from Oleg.Lihvoinen http://dbswh.webhop.net/dbswh/f?p=BLOG:READ:0::::ARTICLE:11000346061523)
SELECT blob_content
INTO v_blob_data
FROM wwv_flow_files
WHERE NAME = p_file_name;
v_position := 1;
blob_csid := 873 ;
DBMS_LOB.createtemporary (lob_loc => v_clob_data,
CACHE => TRUE,
dur => DBMS_LOB.SESSION
DBMS_LOB.converttoclob (v_clob_data,
v_blob_data,
amount,
dest_offset,
src_offset,
blob_csid,
lang_ctx,
warning
v_clob_len := DBMS_LOB.getlength (v_clob_data);
IF v_clob_len = 0 THEN
RETURN;
END IF;
WHILE (v_position <= v_clob_len + 1)
LOOP
v_char := DBMS_LOB.SUBSTR (v_clob_data, c_chunk_len, v_position);
v_line := v_line || v_char;
v_position := v_position + c_chunk_len;
I have tried different values for "blob_csid := 873 ;" (and by the way, the list of possible values for this code is very difficult to find : I know, there is a function CS_name to CS_ID but a list would be great), but without any visible effect.
If I use the Apex CSV uploader app, the result is the same than with this code.
Here is an example :
�O�R�A�C�L�E�
instead of :
ORACLE
How I can have these files imported whithout an Excel conversion ?
Thanks.

Answer 1

Hum, looks like the error is thrown before the execution, during the sort of prepare/precompile of the package procedure, and it said that v_line := v_line || v_char is too small string buffer.
I am a bit surprised.
Anyone on this ????? I am doing answers myself, it will not help me a lot :)