Forum .LRN Q&A: Importing Courses from OWC

Hi, I'm trying to import a course that I downloaded from http://ocw.mit.edu... Tha course uses IMS-CP 1.1.. Everything is ok and is processing the files but then it gets to a part that says the following:

Now processing imsmanifest.xml file...Granting permissions Test Manifest...
Adding Test Manifest...
Adding Manifest Metadata...
Adding Organization {Computation Structures}...

And after that it gives the following error:


Error: Ns_PgExec: result status: 7 message: ERROR: duplicate key value violates unique constraint "cr_items_unique_name"
CONTEXT: SQL statement "insert into cr_items ( item_id, name, content_type, parent_id, storage_type ) values ( $1 , $2 , $3 , $4 , $5 )"
PL/pgSQL function "content_item__new" line 105 at SQL statement

[17/Mar/2010:13:11:43][12970.3056380784][-conn:mdotlrn::6] Error: POST http://localhost:8000/dotlrn/classes/itdevelopment/itdevelopment.packaging/packaging/lorsm/admin/course-add-3?
referred by "http://localhost:8000/dotlrn/classes/itdevelopment/itdevelopment.packaging/packaging/lorsm/admin/course-add-2";
Database operation "0or1row" failed
(exception NSDB, "Query was not a statement returning rows.")

while executing
"ns_pg_bind 0or1row nsdb0 {

select content_item__new(:name,:parent_id,:item_id,:locale,:creation_date,:creation_user,:context_id,:creation_ip,:item_s..."
("uplevel" body line 1)
invoked from within
"uplevel $ulevel [list ns_pg_bind $type $db $sql]"
("postgresql" arm line 2)
invoked from within
"switch $driverkey {
oracle {
return [uplevel $ulevel [list ns_ora $type $db $sql] $args]
}
..."
invoked from within
"db_exec 0or1row $db $full_statement_name $sql"
invoked from within
"if {[regexp -nocase -- {^\s*select} $test_sql match]} {
# ns_log Debug "PLPGSQL: bypassed anon function"
set selection..."
("uplevel" body line 6)
invoked from within
"uplevel 1 $code_block "
invoked from within
"db_with_handle -dbn $dbn db {
# plsql calls that are simple selects bypass the plpgsql
# mechanism for creating anonymous fun..."
(procedure "db_exec_plsql" line 57)
invoked from within
"db_exec_plsql exec_func_plsql {}"
(procedure "package_exec_plsql" line 31)
invoked from within
"package_exec_plsql -var_list $var_list content_item new"
invoked from within
"set item_id [package_exec_plsql -var_list $var_list content_item new]"
("uplevel" body line 3)
invoked from within
"uplevel 1 $transaction_code "
(procedure "db_transaction" line 39)
invoked from within
"db_transaction {
db_dml lock_objects "LOCK TABLE acs_objects IN SHARE ROW EXCLUSIVE MODE"
set item_id [package_exec_plsql -var_list $var_list cont..."
(procedure "content::item::new" line 25)
invoked from within
"content::item::new -name $name -item_id $item_id -content_type $content_type -parent_id $parent_id -creation_date [dt_sysdate] -creation_user $user_i..."
(procedure "lors::imscp::item_add" line 33)
invoked from within
"lors::imscp::item_add -org_id $p_org_id -parent_item $p_parent_item -identifier $p_identifier -identifierref $p_identifierref -isvisible $p_isvis..."
(procedure "lors::imscp::addItems" line 29)
invoked from within
"lors::imscp::addItems -itm_folder_id $new_items_parent_id -org_id $org_id $list_items 0 $tmp_dir"
("foreach" body line 28)
invoked from within
"foreach organization [$organizations child all organization] {

set org_identifier [lors::imsmd::getResource -node $organization -att ..."
invoked from within
"if {[file exists $fs_dir]} {
set all_files [list]
# now that exists, let's create it on the CR

# gets rid of the path and lea..."
("uplevel" body line 14)
invoked from within
"uplevel 1 $transaction_code "
(procedure "db_transaction" line 39)
invoked from within
"db_transaction {

## adds folder to the CR
set parent_id $folder_id
set fs_dir $tmp_dir

# checks for write permission on the parent f..."
("uplevel" body line 63)
invoked from within
"uplevel {
ad_page_contract {
Upload an IMS Content Package 3

Scope:

Add files to the CR
Process imsmanifest.xml
Determine..."
(procedure "code::tcl::/var/lib/aolserver/mdotlrn/packages/lorsm/www/adm..." line 2)
invoked from within
"code::tcl::$__adp_stub"
invoked from within
"if { [file exists $__adp_stub.tcl] } {

# ensure that data source preparation procedure exists and is up-to-date
adp_init tcl $__adp_stub
..."
("uplevel" body line 3)
invoked from within
"uplevel {

if { [file exists $__adp_stub.tcl] } {

# ensure that data source preparation procedure exists and is up-to-date
adp_init t..."
(procedure "adp_prepare" line 2)
invoked from within
"adp_prepare"
invoked from within
"template::adp_parse [file root [ad_conn file]] {}"
(procedure "adp_parse_ad_conn_file" line 6)
invoked from within
"$handler"
("uplevel" body line 2)
invoked from within
"uplevel $code"
invoked from within
"ad_try {
$handler
} ad_script_abort val {
# do nothing
}"
invoked from within
"rp_serve_concrete_file [ad_conn file]"
(procedure "rp_serve_abstract_file" line 60)
invoked from within
"rp_serve_abstract_file "$root/$path""
("uplevel" body line 2)
invoked from within
"uplevel $code"
invoked from within
"ad_try {
rp_serve_abstract_file "$root/$path"
set tcl_url2file([ad_conn url]) [ad_conn file]
set tcl_url2path_info..."

I don't understand why it should be a constraint violation.. is something wrong with the package or something else??

Thanks in advanced..

Rafael