When defining environment variables to be used by the OPSUSS servers in the member pointed by STDENV DD statement (usually member USSENV00), variables with names ending with the strings _USER and _PASSWORD are being ignored.
For example:
xxxxxx_USER=someuserid
yyyyyy_PASSWORD=somepsw
When trying to retrieve the variables above users get empty strings.
OPS/MVS USS OPSUSS ADDRESS USS USSCMD
APAR LT12879 solves this problem