When doing a seamless download of a large subset, get the following error U4087:
%IEFDOWW MODEL('<model name>') SUB('ALL') SOFT('9.2.A6') CPID(1252)
DSN ENDED DUE TO ERROR+
PROGRAM: TIEDOWNX, ABEND U4087
COMMAND ERROR NOT FOUND
Memory and/or space
Increase TSO memory size or run in background with REGION=0M. Also verify the <uid>.TRAN file has adequate space.