Question : Oracle cursor loop gives error ora-06502

The following code works for small amounts of data
but gives this error with alot of data..

BEGIN
*
ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error
ORA-06512: at line 68
 
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...
declare
v_body clob;
cursor c is
 select * from tables;
...
---- START OF TABLE
v_body := v_body||'<table border="1" cellspacing="1" cellpadding="1">';

--headers
v_body:= v_body||'<tr>'||
'<td width="150">PO ID#</td>'||
'<td width="100">Vendor ID#</td>'||
'<td width="80">Vendor Loc#</td>'||
'<td width="80">Project#</td>'||
'<td width="95">Activity#</td>'||
'<td width="75">PO Line#</td>'||
'</tr>';

for v in c loop       --(this is where the error occurs)

v_body:= v_body||'<tr>'||
'<td>'||v.po_id||'</td>'||
'<td>'||v.ps_vendor_id||'</td>'||
'<td>'||v.ps_vendor_loc||'</td>'||
'<td>'||v.project_id||'</td>'||
'<td>'||v.activity_id||'</td>'||
'<td>'||v.po_line_no||'</td>'||
'</tr>';

end loop;
v_body := v_body||'</table>';
---- END OF TABLE
  
v_body := v_body||'</BODY></HTML>';

Answer : Oracle cursor loop gives error ora-06502

sorry I didn't notice this before...
one or more of the columns you are appending is not a string type

try wrapping them in to_char

'<td>'|| to_char(v.po_line_no) ||'</td>'||
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