CMDB Import

Hello Everybody!

We are trying to do a massive import of items to our CMDB, but I find this problems;

Error in line 1 (or 2,3,...)= -1

If I have a CSV file with multiple CI from the same Type, has all the fields be completed?

I mean, in a list of 20 laptops, some has "Assignament Date" but not others...

Is necessary to all CI has the same completed fields?

Where can I check a Log about this?

Many Thanks.