The //SCISCIM file traces SCI messages flowing through the SCIREQ API.
SDS0540I The //SCISCIM DD has been opened.
SDS0541I The //SCISCIM DD attributes render it unusable. Need RECFM=VB, minimum BLKSIZE=88, minimum LRECL=84.
SDS0542I The //SCISCIM DD has become full.
SDS0543I The //SCISCIM DD has been closed.