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I have a problem of export and import in my site,

error are :

system - import/export - export :

http://i.stack.imgur.com/C5y2X.png

system - import/export - dataflow profiles - export all products :

http://i.imgur.com/PkRsHxQ.png

marked as duplicate by Fabian Schmengler, Qaisar Satti, Raphael at Digital Pianism, Fabian Blechschmidt, brentwpeterson Jul 22 '16 at 20:12

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1

I do not know if it's your case, but the "No valid data sent" Error, I have seen it when there is a problem in the catalog_category_entity table, specifically if for any reason, any category has in parent_id the id of a category that no longer exists.

I think the error comes directly from the method exportAction() from Mage_ImportExport_Adminhtml_ExportController class:

public function exportAction()
{
    if ($this->getRequest()->getPost(Mage_ImportExport_Model_Export::FILTER_ELEMENT_GROUP)) {
        try {
            /** @var $model Mage_ImportExport_Model_Export */
            $model = Mage::getModel('importexport/export');
            $model->setData($this->getRequest()->getParams());

            return $this->_prepareDownloadResponse(
                $model->getFileName(),
                $model->export(),
                $model->getContentType()
            );
        } catch (Mage_Core_Exception $e) {
            $this->_getSession()->addError($e->getMessage());
        } catch (Exception $e) {
            Mage::logException($e);
            $this->_getSession()->addError($this->__('No valid data sent'));
        }
    } else {
        $this->_getSession()->addError($this->__('No valid data sent'));
    }
    return $this->_redirect('*/*/index');
}

So, check the var/log/exception.log, maybe you can see more information about the error.

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