NCLOB storage

Hi, I have a perfectly fine piece of code that takes a form input and stores it as a CLOB, but when I try to store it in an NCLOB with the same piece of code I get an error: Warning: OCILobWrite: ORA-24806: LOB form mismatch in c:\apache\htdocs\working_clob.php on line 24 $sql = "insert into jtest values (1,empty_clob(),empty_clob()) returning b into :b"; $stmt = OCIParse($connected, $sql); $clob = OCINewDescriptor($connected, OCI_D_LOB); OCIBindByName ($stmt, ":b", &$clob, -1, OCI_B_CLOB); OCIExecute($stmt, OCI_DEFAULT); $clob->save ($HTTP_POST_VARS["bigtext"]); // this is line 24 OCICommit($connected); OCIFreeDescriptor($clob); OCIFreeStatement($stmt); At a guess I need to use the multibyte string functions but there seems to be a big old lack of examples :-/ The following seems to have zero effect: mb_internal_encoding()="UTF-8"; $interenc = mb_internal_encoding(); $inputenc = mb_convert_variables($interenc, "ASCII,UTF-8,SJIS-win", $HTTP_POST_VARS["bigtext"]); Anyone know how I set this up? System is php 4.06, Apache 1.3.20 and W2K. Thanks, J.