Host and listener "unavailable" on em dbconsole

Question

I'm running oracle 10g on linux.
In Home/general there is not the name of the host and listener, only "unavailable".
What could be?
Oracle is running and I'm using it with Compiere (an erp java application).
I'm getting problem to put the credential to do backup, and doesn't work. So I'm tring to see what could be.
Maybe this error could be the cause.
Many thanks for your help.
Nicola.

Answer 1

1) In a file called targets.xml
2) Most people here refuse to read documentation, even when requested to do so by the Forums Etiquette post.
For your convenience, I copied here the relevant part of the doc
h5. 1.2.6.7.3 Using EMCA When Database Host Name or IP Address Changes
When the database host name (including the domain name) or the IP address changes, deconfigure and then reconfigure the Database Console with the repository create command. Run the following command:
{noformat}emca -deconfig dbcontrol db -repos drop
emca -config dbcontrol db -repos create
{noformat}
or
{noformat}emca -deconfig dbcontrol db
emca -config dbcontrol db -repos recreate
Just search for 'emca' on [http://tahitit.oracle.com] to get further info. As alll Oracle configuration tool names end in 'ca'
finding the correct tool name (emca) is not difficult.
Kindly avoid asking doc questions in the future.
Regards
Sybrand Bakker
Senior Oracle DBA
{noformat}