OK, I discussed things with Guewen, and it seems that the suggestion of using [''] works with magento >= 1.5. So the latest head of the main branch should fix the issue for magento 1.5 and 1.7. You to get the head of lp:magentoerpconnect/openerp6.1-legacy-module, change your referential to 1.5.0.0+, reload the mapping, test and report back.
OK, I discussed things with Guewen, and it seems that the suggestion of using [''] works with magento >= 1.5. So the latest head of the main branch should fix the issue for magento 1.5 and 1.7. You to get the head of lp:magentoerpconnect/openerp6.1-legacy-module, change your referential to 1.5.0.0+, reload the mapping, test and report back.