Unable to use WPG_DOCLOAD.download_file in Apex 4.2.1

Question

Hi guys,
I stumbled on the next problem. We recently migrated from apex 4.0 to 4.2.1 and use a procedure to open an RTF document filled with parameters from a chosen record.
It always worked with the a procedure calling the next line: WPG_DOCLOAD.download_file (l_doc);
Now, in 4.2.1 it doesn't do anything, doesn't give an error if a press the button.
Has anyone experienced the same problem? I already searched the internet but never found a solution.
Thanks in advance.

Answer 1

thanks for your fast answer. The issue is with a migrated application.
And here is snippet of my package code:
  l_filename := r_brief.template_naam;
  l_mime_type := r_brief.template_mime;
  v_document_clob := GEN$PL_UTILS.blob_to_clob(r_brief.template_blob);
  v_document_clob := GEN$PL_UTILS.replace_tags_in_clob(v_document_clob , tab_temp_tags_values, tab_temp_toegelaten_tags, v_replace_error);  
  l_doc := GEN$PL_UTILS.clob_to_blob(v_document_clob);
  l_length := DBMS_LOB.getlength(l_doc);
  OWA_UTIL.mime_header (l_mime_type);
  HTP.p ('Content-length: ' || l_length);
  HTP.p ('Content-Disposition: attachment; filename="'||REPLACE(REPLACE(SUBSTR(l_filename,INSTR(l_filename,'/')+1),CHR(10),NULL),CHR(13),NULL)||'"');
  OWA_UTIL.http_header_close;
  WPG_DOCLOAD.download_file (l_doc);
Do you see something wrong here?