我正在使用Azure Data Factory v2。我创建了一个管道。内部是复制数据活动。我正在运行一个复制活动，该活动从O数据源检索数据并将其传输到Azure SQL数据库。当我从源预览数据时，它成功检索了所有数据，但是当我运行活动时，它返回如下错误：
"error Code": "2200",
"message": "Failure happened on 'Source' side. 'Type=System.Collections.Generic Key Not Found Exception,Message=The given key was not present in the dictionary.,Source= ms cor lib,'",
有人可以帮我吗？急需。
"errorCode": "2200",
"message": "Failure happened on 'Source' side. 'Type=System.Collections.Generic.KeyNotFoundException,Message=The given key was not present in the dictionary.,Source=mscorlib,'",