Why can DOA not run in "SOFTWARE\ORACLE\HOME1"???

[php]

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE]
"inst_loc"="C:\\Program Files\\Oracle\\Inventory"
"ORACLE_HOME_NAME"="OraHome81"
"ORACLE_GROUP_NAME"="Oracle - OraHome81"
"NLS_LANG"="NA"
"VOBHOME2.0"="C:\\oracle\\ora90"

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\ALL_HOMES]
"HOME_COUNTER"="2"
"DEFAULT_HOME"="OraHome81"
"LAST_HOME"="1"

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\ALL_HOMES\ID0]
"NAME"="OraHome81"
"NLS_LANG"="NA"

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\ALL_HOMES\ID1]
"NAME"="OraHome90"
"PATH"="C:\\oracle\\ora90"
"NLS_LANG"="NA"

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\HOME0]
"ID"="0"
"ORACLE_GROUP_NAME"="Oracle - OraHome81"
"ORACLE_HOME_NAME"="OraHome81"

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\HOME1]
"ID"="1"
"ORACLE_GROUP_NAME"="Oracle - OraHome90"
"ORACLE_HOME_NAME"="OraHome90"
"ORACLE_HOME"="C:\\oracle\\ora90"
"NLS_LANG"="NA"
"ORACLE_BUNDLE_NAME"="Enterprise"
"ORACLE_HOME_KEY"="Software\\ORACLE\\HOME1"

-------------------------------------------------
But

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE]
"inst_loc"="C:\\Program Files\\Oracle\\Inventory"
"ORACLE_HOME_NAME"="OraHome81"
"ORACLE_GROUP_NAME"="Oracle - OraHome81"
"NLS_LANG"="NA"
"VOBHOME2.0"="C:\\oracle\\ora90"

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\ALL_HOMES]
"HOME_COUNTER"="2"
"DEFAULT_HOME"="OraHome81"
"LAST_HOME"="1"

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\ALL_HOMES\ID1]
"NAME"="OraHome81"
"NLS_LANG"="NA"

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\ALL_HOMES\ID0]
"NAME"="OraHome90"
"PATH"="C:\\oracle\\ora90"
"NLS_LANG"="NA"

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\HOME1]
"ID"="0"
"ORACLE_GROUP_NAME"="Oracle - OraHome81"
"ORACLE_HOME_NAME"="OraHome81"

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\HOME0]
"ID"="1"
"ORACLE_GROUP_NAME"="Oracle - OraHome90"
"ORACLE_HOME_NAME"="OraHome90"
"ORACLE_HOME"="C:\\oracle\\ora90"
"NLS_LANG"="NA"
"ORACLE_BUNDLE_NAME"="Enterprise"
"ORACLE_HOME_KEY"="Software\\ORACLE\\HOME0"

OK.
why?

 

[Marco Kalter]

What exactly is the problem?