CSV import failing with "Fatal error during import" display. Anyone advise on solutions to this?

[NTNT]

Keep getting errors with during the import process. Any tips / Guidance / Advice is very much welcome.

Thanks again guys.

More information below

java.lang.NullPointerException at com.atlassian.jira.plugins.importer.imports.bulkcreate.engine.BulkCreateDataImporter.doImportIssues(BulkCreateDataImporter.java:235)