Invalid disp field-pass substitued

I often see information similar to "ief48i invalid disp field-pass substitued" in the job log, which is usually ignored. I think about it carefully, but it is actually very simple:

To use a temporary file in jcl, first create the temporary file.

// Sortout dd DSN = & temp, DISP = (, catlg), Space = (TRK, 1)

The temporary file is used.

// Sysut1 dd DSN = & temp,Disp = SHR

The problem lies in disp = SHR, which is actually disp = (SHR, keep). For temporary files, normal-termination can only be pass, while abnormal-termination is meaningless. so change to disp = (SHR, pass) and there will be no more warning message.