I am trying to do upsert through data loader.It is throwing the following error for all rows in the csv file.The ids used in the csv file are correct.I got those ids from url. Please Help!
ERROR: "INVALID CROSS REFERENCE ID"
Based on your comments, at minimum, the Case Owner field is incorrect. Case Owner reads "Queue: Tier II", which is not a Salesforce ID. You will need to locate the Queue's ID (Setup > Administer > Manage Users > Queues), and place this in your CSV file. In addition, the Transferred To field also appears to be a user/queue lookup field, so you may need to adjust this field as well. Also, Case ID is null, but should probably be a non-null value. If you're doing this from a report, I suggest that you actually try running a SOQL query from the Data Loader to make sure you get a good look at how the data is supposed to be.