I just stumbled onto this logical name FUBAR (all upper case when should be mixed case). For most sessions this problem does not matter. However, if you want to mess around with some python files on the system disk, then your set your session to case sensitive, you will be in a world of confusion.
Neil
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$ sh log python*/sys
(LNM$SYSTEM_TABLE)
"PYTHON$ROOT" = "KAWC09$DKB0:[SYS0.SYSCOMMON.PYTHON.]"
"PYTHON$SHR" = "PYTHON$ROOT:[LIB]PYTHON$SHR.EXE"
"PYTHONHOME" = "/python$root"
"PYTHON_WHEELS$ROOT" = "KAWC09$DKB0:[SYS0.SYSCOMMON.WHEELS.]"
(LNM$SYSCLUSTER_TABLE)
$ dir KAWC09$DKB0:[SYS0.SYSCOMMON]PYTHON.DIR/nohead
KAWC09$DKB0:[SYS0.SYSCOMMON]python.DIR;1
Total of 1 file.
$ dir KAWC09$DKB0:[SYS0.SYSCOMMON]WHEELS.DIR/nohead
KAWC09$DKB0:[SYS0.SYSCOMMON]wheels.DIR;1
Total of 1 file.
$
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