Resolve Problems When Importing Data
When you import data from a file, if you see a warning message that the data was not imported or only partially imported, you might need to make changes to the file and import the file again.
To resolve problems during import, you might want to compare the data in your file to the data in the database. You can see the actual data in the database in the Data tab of your business object. You can also export the current data as a CSV file and compare the data using a tool on your local system.
When you import a CSV file with a Date field, dates must be in the standard ISO format, for example, 2017-09-31. For files with string type fields, the data in each string field must not exceed 4000 bytes.
When you see a warning message: