Your tablename is probably too long, when you check http://developer.teradata.com/doc/connectivity/jdbc/reference/current/jdbcug_chapter_2.html#BABIIEAG you'll find
JDBC FastLoad creates two temporary error tables with the following naming convention: ._ERR_1 and ._ERR_2
The name of the destination table in the Teradata Database that is to be used by JDBC FastLoad CSV must not exceed 24 characters because of the name of the two error tables created by JDBC FastLoad CSV
If this was a standard FastLoad i would simply add ERRORTABLES and use my own error table names, but this seems not to be available in JDBC FastLoad. So your only option is to create the table with a shorter name, FastLoad it and thensubmit a RENAME TABLE.