When I use the 2.6 version to import, I get this nice sql error.
Unknown column 'vmp.product_id' in 'field list' SQL=INSERT IGNORE INTO `l7hr9_hikashop_product` (`product_name`,`product_description`,`product_quantity`,`product_code`,`product_published`,`product_hit`,`product_created`,`product_modified`,`product_sale_start`,`product_tax_id`,`product_type`,`product_url`,`product_weight`,`product_weight_unit`,`product_dimension_unit`,`product_sales`,`product_width`,`product_length`,`product_height`) SELECT vmpeg.product_name,CONCAT(vmpeg.product_s_desc,'<hr id="system-readmore"/>',vmpeg.product_desc),case when vmp.product_in_stock IS NULL or vmp.product_in_stock < 0 then 0 else vmp.product_in_stock end,case when vmp.product_sku IS NULL or vmp.product_sku="" then MD5(vmp.product_id) else vmp.product_sku end,vmp.published,0,UNIX_TIMESTAMP(vmp.created_on),UNIX_TIMESTAMP(vmp.modified_on),UNIX_TIMESTAMP(vmp.product_available_date),hkc.category_id,'main',vmp.product_url,vmp.product_weight,LOWER(vmp.product_weight_uom),LOWER(vmp.product_lwh_uom),vmp.product_sales,vmp.product_width,vmp.product_length,vmp.product_height FROM `l7hr9_virtuemart_products` AS vmp INNER JOIN `l7hr9_virtuemart_products_en_gb` vmpeg ON vmp.virtuemart_product_id = vmpeg.virtuemart_product_id LEFT JOIN `l7hr9_virtuemart_product_prices` vmpp ON vmpeg.virtuemart_product_id = vmpp.virtuemart_product_id LEFT JOIN `l7hr9_hikashop_taxation` hkt ON hkt.tax_vm_id = vmpp.product_tax_id LEFT JOIN `l7hr9_hikashop_category` hkc ON hkc.category_namekey = hkt.category_namekey LEFT JOIN `l7hr9_hikashop_vm_prod` AS hkp ON vmp.virtuemart_product_id = hkp.vm_id WHERE hkp.hk_id IS NULL AND vmp.virtuemart_product_id > 0 GROUP BY vmp.virtuemart_product_id ORDER BY vmp.virtuemart_product_id ASC LIMIT 100;