发布提示错误Operand should

从定时表提取内容，然后做发布动作，提示 Operand should contain 1 column(s)

$times = \Phpcmf\Service::M()->table(SITE_ID.'_'.$dir.'_time')->get($rt['code']);

 \Phpcmf\Service::C()->_module_init($dir);

$t = \Phpcmf\Service::C()->content_model->post_time($times);

但是，根据采集接口说明做的数据格式提交上去

$rt = \Phpcmf\Service::C()->content_model->save_content(0, $save);

也是提示这么个错误 Operand should contain 1 column(s)

请问有知道解决办法的吗？

Operand should contain 1 column(s)
错误文件：/www/wwwroot/eros.com/dayrui/CodeIgniter/System/Database/BaseConnection.php（647）