i know your error, some users cannot be synced.

all you got to do is edit that user manually using phpMyAdmin and correct the error mentioned on the error text.

Xema, post your error message in the forum.

We will tell you what to do 

Some user name Joomla will not accept and SMF will not accept either

You have to change user name

example


USER NAME JJ 'JONES <-- Not good for Joomla or SMF

NOT EVEN ONE USER SYNC WITH SMF?

Try user log in to SMF first THEN JOOMLA?

help me, please. i can do? how?

Xema, mi espanol es peor que tu ingles pero.... para clarificacion, el database(base de datos??) para Joomla esta el mismo database para SMF, cierto?  Y tu instalacion de Joomla no esta un upgrade de Mambo?  Es possible que tu tienes una mesa en el database con el nombre mos_users o como asi?  Cuando yo instale Joomla de Mambo me olvide que las mesas tienen nombres diferentes. 

Cual es el prefijo de tu SMF database mesas y tu Joomla database mesas?

Tambien, tu sitio esta en linea?  Cual es la direccion? 

well, looking at the code essentially the sync happens like this, first select all the SMF users that aren't in jos_users and then add them.  The SQL to select the users is like this:


That selects the users in smf that are not in Joomla.  The insert is using Joomla functions so the exact SQL is somewhere in the depths of the Joomla source.  Maybe by doing the above select you can detect an issue.  Essentially, the elements that get inserted into jos_users are:

realName
memberName
emailAddress
password


There is some more to it, but that is the essentials.