java null pointer exception error on import

I have installed ia new copy of rc11 on an XP box and am trying to import a solution exported from a mac copy of rc10 but I get the following error:

com.servoy.j2db.persistence.RepositoryException: java.lang.NullPointerException

Any clues as to what the problem is?

Could you sent over the .log.txt file as found in the install dir when this happens? (it is likely a bug)