How many elements can ...

How many elements can I map in a plsql table of varchar2 from java?
I have an plsql variable like "create or replace type CHAR_ARRAY as table of varchar2(255)", which i mapped using an oracle.sql.ARRAY[] variable in java because it is an IN/OUT var.
In java class I reload the array, but I can load only 17 elements, after I have this error:
ERROR:
ORA-01041: internal error. hostdef extension doesn't exist
and then the connection closes.
Can someone help me?

Hello Federica,
how did you manage to use oracle.sql.ARRAY[]?
When i try to create a deployment for a method using this as parameter, i get the error:
"Parameter #1 is of type oracle.sql.ARRAY, which does not map to any PL/SQL data type".
Thank you for your help!
Udo

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