LargeObjectManager problem

Hi all.
   I'm working with LargeObjectManager to create LOB object as the
documentation examples.
   I have postgresql 7.0.2 with jdk1.2 and jsdk20
   I have the following method to create LOB objects:

***********************************************************************

private int createLOB(ByteArrayInputStream bais) throws FileNotFoundException, IOException, SQLException {
   System.err.println("Creating a large object");   int oid =
lobj.create(LargeObjectManager.READ|LargeObjectManager.WRITE);  System.err.println("Open a large object");
LargeObjectobj = lobj.open(oid,LargeObjectManager.WRITE);
 
   System.err.println("Copying file to large object");   byte buf[] = new byte[2048];   int s,tl=0;
while((s=bais.read(buf,0,2048))>0){     System.out.println("Block size="+s+" offset="+tl);
 
     obj.write(buf,0,s);     tl+=s;   }
   System.err.println("Closing object");   obj.close();   return oid; }

**************************************************************************

when I insert the LOB object in a table:

ByteArrayInputStream bais = new ByteArrayInputStream(x);
int oid = createLOB(bais);

String query = "insert into tupdate values ('"+ pkey_value +"','" + CN + "','" + client + "','" +requestFormat + "','"
+date + "','" + oid + "','" + updated +"')";
 
s.executeUpdate(query);
connection.commit();
bais.close();

It work fine, but sometime (only sometime) fail with:

FastPath call returned FATAL 1:  my bits moved right off the end of the world!       Recreate index
pg_attribute_relid_attnam_index.
       at org.postgresql.fastpath.Fastpath.fastpath(Compiled Code)       at
org.postgresql.fastpath.Fastpath.fastpath(CompiledCode)       at org.postgresql.fastpath.Fastpath.getInteger(Compiled
Code)      at org.postgresql.largeobject.LargeObjectManager.create(Compiled Code)       at
piscis.pki.ca.database.DBManager.createLOB(CompiledCode)          ..............
 
CArevoke Error: FastPath call returned FATAL 1:  my bits moved right off the end of the world!       Recreate index
pg_attribute_relid_attnam_index.

Why?

Can anybody help me, please

--
Gabriel López Millán
Facultad de Informática -Universidad de Murcia
30001 Murcia - España (Spain)
Telf: +34-968-364644 E-mail: gabilm@dif.um.es