Running apex_util.get_print_document with APEX_MAIL

Question

I am trying to automate the running of an apex_util.get_print_document, emailing the output to my users. When the job tries to run I get this error in the log:
ORA-20022: Null value supplied for parameter p_attachment.
ORA-06512: at "FLOWS_030100.WWV_FLOW_MAIL", line 731
ORA-06512: at "SIS_EXPRESS.SIS_EXPRESS_REPORTS", line 154
ORA-06512: at line 2
Not sure where I can check this to see the problem. Anybody do this before?
BEGIN
l_report_blob := apex_util.get_print_document(
p_application_id => l_application_id,
p_report_layout_name => l_report_query_name,
p_report_query_name => l_report_query_name,
p_report_layout_type => l_output_format,
p_document_format => l_output_format,
p_print_server => null);
l_id := APEX_MAIL.SEND( p_to => '[email protected]',
p_from => '[email protected]',
p_subj => 'APEX_MAIL with attachment',
p_body => 'Please review the attachment.',
p_body_html => 'Please review the attachment' );
APEX_MAIL.ADD_ATTACHMENT( p_mail_id => l_id,
p_attachment => l_report_blob,
p_filename => l_report_query_name,
p_mime_type => l_mime_type);
COMMIT;
END;

Answer 1

Hi Paul,
APEX_UTIL API consists of 4 different GET_PRINT_DOCUMENT Functions based on parameters types(Function Overloading) that are being passed. If you look at the function where CLOB is the data type for parameter p_report_data, the bind variables can be passed to the SQL which willl be used by DBMS_XMLGEN or other XML/CLOB generation API's.
I have used DBMS_XMLGEN to generate the CLOB data which intern used by GET_PRINT_DOCUMENT function.
Regards
Shesh