API reference for Node import 6
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Global variable: $node_import_can_continue
Boolean. Some imports may not be able to do more then one row at a time because of all kinds of (static) caching in Drupal. For example if you import a node with taxonomy terms and select to create the non-existing terms on import, taxonomy_get_tree() will not have an up-to-date internal list of terms and so the submission of the form will fail due to "An illegal choice has been detected. Please contact the site administrator.".
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