Ned, thanks for your help
But it still the same. Here is the response:
[status] => stdClass Object ( [version] => 4.2 [code] => 0 [message] => Success )
[total_items] => 1001
[items_updated] => 1001
[percent_complete] => 100
[ticket_status] => complete
[update_info] => Array
(
[0] => stdClass Object
(
[item_id] => 1001_750
[info] => couldn't resolve item
)
[1] => stdClass Object
(
[item_id] => 100_86
[info] => couldn't resolve item
)
[2] => stdClass Object
(
[item_id] => 101_87
[info] => couldn't resolve item
)
For all 1001 rows it returns "couldn't resolve item" :( May be something wrong with my API key?