Create Downloadlink with custom blob to start other Application

Greetings!
We are using Apex 4.2.1 and another system. For this other system you can use simple files with an id, that start it and open a specific page, same way like e.g. automatically opening ms-word, when downloading a .doc file.
So we would like to have a column in an APEX-report, that has this download functionality. I have read throu How to convert varchar to BLOB in oracle 10g? and took a look at this APEX tutorial and a Blog from Eddie Awad.
But still I cant get it to work.
For testing purposes I have created a table with a blob column, and a procedure, like the one in the APEX tutorial.
When I call the procedure like in that example#OWNER#.download_my_file?p_file=#ID#I get the error message: The requested URL /pls/prod/(our owner).download_my_file?p_file was not found on this server. Maybe it does not work with the server setup we are running, or needs some adjustments?
Also as mentioned by Eddie Awad, that APEX supports BLOB columns in reports, doesnt work for me. The column output (both IR and classic) is "unsupported Datatype".
Can you help me with any advice in this matter?
Thanks very much in advance,
best regards,
tobi

Hi PARS,
thanks for the link.
I followed the example, looks like a nice approach, but I cant get it to work.
I created the procedure, the non-public the Page-0 process(On Load:Before Header), the app-item, and a link with the url as described in that example. But when linking, I get the error ORA-01403: No Data found. The process is not executed.
I think I can solve it with the APEX-buildin BLOB download feature in an IR - i have firuged it our now. But using a procedure would still be a much better solution.
edit:
Hi Mike,
thanks for your hints. I have included a propper filename and mimetype in the table. However, if I use a table to open the blob, that would have to be filled beforehand and joined to the other report. So using a procedure on another page would still be better. I will try later again to get that to work.
So far, thanks for your help,
tobi
Edited by: TobiP on 05.06.2013 07:31

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