Terminating because of undefined header variables

I've searched through many threads already but none help me.

I did the same thing last week and an import went just fine. I'm exporting from J2.5 to 3.4. The delimiter is set to: , on both sides. CSV looks good, i do't get it..what am i doing wrong?

CB Version =2.0
CBJ2_HEADER_VARIABLES are
Array ( [0] => name,"username","email","password","block","sendEmail","registerDate","lastvisitDate","activation","params","lastResetTime","resetCount","user_id","firstname","middlename","lastname","hits","message_last_sent","message_number_sent","avatar","avatarapproved","approved","confirmed","lastupdatedate","registeripaddr","cbactivation","banned","banneddate","unbanneddate","bannedby","unbannedby","bannedreason","acceptedterms","cb_huisnummer","cb_postadres","cb_telefoonvast","cb_telefoonmobiel","cb_postcode","cb_straat","cb_huisnr","cb_toevoeging","cb_woonplaats","cb_land","cb_email2","cb_verhuur","cb_verhuurvan","cb_verhuurtot","cb_sleutels","cb_sleutel2","cb_sleutel3","cb_sleutel4","cb_poortopm","cb_pgenable","cb_pgautopublish","cb_pgautoapprove","cb_pgshortgreeting","cb_pgtotalquotasize","cb_pgtotalquotaitems","cb_pguploadsize","cb_pgtotalitems","cb_pgtotalsize","cb_pglastupdate","cb_pgaccessmode","cb_pgdisplayformat","cb_pb_enable","cb_pb_autopublish","cb_pb_notifyme","cb_pb_enable_blog","cb_pb_enable_wall","cb_pb_autopublish_wall","cb_pb_notifyme_wall","cb_trailerstalling","cb_trailerperiode","cb_havenplaats","cb_havenperiode","cb_havenvan","cb_haventot","cb_opmerkingen","usertype" )

name,"username","email","password","block","sendEmail","registerDate","lastvisitDate","activation","params","lastResetTime","resetCount","user_id","firstname","middlename","lastname","hits","message_last_sent","message_number_sent","avatar","avatarapproved","approved","confirmed","lastupdatedate","registeripaddr","cbactivation","banned","banneddate","unbanneddate","bannedby","unbannedby","bannedreason","acceptedterms","cb_huisnummer","cb_postadres","cb_telefoonvast","cb_telefoonmobiel","cb_postcode","cb_straat","cb_huisnr","cb_toevoeging","cb_woonplaats","cb_land","cb_email2","cb_verhuur","cb_verhuurvan","cb_verhuurtot","cb_sleutels","cb_sleutel2","cb_sleutel3","cb_sleutel4","cb_poortopm","cb_pgenable","cb_pgautopublish","cb_pgautoapprove","cb_pgshortgreeting","cb_pgtotalquotasize","cb_pgtotalquotaitems","cb_pguploadsize","cb_pgtotalitems","cb_pgtotalsize","cb_pglastupdate","cb_pgaccessmode","cb_pgdisplayformat","cb_pb_enable","cb_pb_autopublish","cb_pb_notifyme","cb_pb_enable_blog","cb_pb_enable_wall","cb_pb_autopublish_wall","cb_pb_notifyme_wall","cb_trailerstalling","cb_trailerperiode","cb_havenplaats","cb_havenperiode","cb_havenvan","cb_haventot","cb_opmerkingen","usertype" is not valid

Terminating because of undefined header variables

I need to guess here as context of your problem is not given in your post:

So these are pure guesses:

1. Using CB Juice ? (unknown version, latest ?)
2. Having not all fields of old site on new site ?

(I guessed those by googling for that exact error, and found the likely cause by googling too)

Yes, i'm using cbjuice2, latest build.

All fields are there.

We are not developers of CB Juice, which is a third-pary extension that has a support forum here:
www.joomlapolis.com/forum/226-cb-juice

Please start a new topic there where you give exact versions of PHP, Mysql, Joomla, CB, CB Juice, and exact steps to reproduce the issue.