Datapump Import fails with ORA-600

Hi all,

i get an ora-600 error during datapump import directly after start the import

Source DB is 12.1.0.2 equal to the target DB. Here the exactly expression:

Connected to: Oracle Database 12c Standard Edition Release 12.1.0.2.0 - 64bit Production

With the Automatic Storage Management option

ORA-31694: master table "SYS"."SYS_IMPORT_SCHEMA_01" failed to load/unload

ORA-02354: error in exporting/importing data

ORA-39776: fatal Direct Path API error loading table "SYS"."SYS_IMPORT_SCHEMA_01"

ORA-00600: internal error code, arguments: [klaprs_11], [12], [7], [2522], [], [], [], [], [], [], [], []

Can everybody help me? thanks in advance

Stefan