(68,41) Can not set UDA/UDET name

Hi Friends
can you help me about below error.

(68,41) Can not set UDA/UDET name, as
no available keys left for dictionary
database PPROJECT/ENGIDICT-A. Please
use a different dictionary DB

thx

1000 Keys are limit for UKEYS in a Dictionary Database.

Per UDA one ukey will be assigned by the system.