VM2 stable fails user migration

[e-trader]

Upgrade of JM1.17 on Joomla 1.5.23 to VM2 stable release (no Joomla upgrade).

Did migration as described here: http://forum.virtuemart.net/index.php?topic=95236.0

During migration of everything, I get:

Fatal error: Class 'storing user adress dataTableVmusers' not found in C:\wamp\www\libraries\joomla\language\language.php on line 171

Error repeats when repating the migration procedure. Error bypassed doing all migration components except when doing "users".