When the DBABE option is in effect, IEBCOPY issues a user abend after issuing any of these messages:

U1021 -- IEB1021I I/O error SYNAD text
U0172 -- IEB172I  <dd_name> COULD NOT BE OPENED
U0183 -- IEB183I Unexpected EOF on unload dataset
U0184 -- IEB184I Physical block too big
U1044 -- (no message) I/O intercept posted reading
U2044 -- (no message) I/O intercept posted reading