根据票据信息背书无法生成凭证

1、请备份帐套然后修改此备份帐套的帐套号为另一个帐套号作为测试帐套并引入产品；

2、将采购订单与采购发票关联，查询出发票“到期日”为空的单据并将结果插入到tempdb库中做备份。对测试帐套执行脚本：select d.* into tempdb..purbillvouch_caccountpdatebak from po_pomain as a join po_podetails as b on a.poid=b.poid join purbillvouchs as c on b. id=c.iposid join purbillvouch as d on d.pbvid=c.pbvid where d.caccountpdate is null ；

3、然后查询有问题的采购发票：select cpbvcode as 采购发票 from tempdb..purbillvouch_caccountpdatebak，试试这些采购发票是否均有此问题；

4、如果确定，将采购订单与采购发票关联，查询出发票“到期日”为空的单据并将订单到期日复制到发票到期日中，请执行以下脚本得以解决update d set d.caccountpdate=a.caccountpdate from po_pomain as a join po_podetails as b on a.poid=b.poid join purbillvouchs as c on b. id=c.iposid join purbillvouch as d on d.pbvid=c.pbvid where d.caccountpdate is null。