Hi,
Did you split tables before start the export ? Did you executed SMIGR_CREATE_DDL report prior to DB export?
You need to execute this report before the export and copy these files to target system export dump location before starting the import.
Can you check if those entries with "err" are listed in the SQL file?
Also follow the recomendations at upgrade guide : Update the R3load, R3tra, tp
Hope this helps.