Cannot select custom app for new index

[mwcentracomm]

I added a new index to my enterprise server, but on the indexer I cannot add it because it will not allow me to select the custom app.

[diogofgm]

Can you give more details about this issue you're facing?
How is your splunk infra design? is it standalone or distributed? 
If its distributed how are you deploying the configurations? Using deployment server?
What are you trying to accomplish?

[mwcentracomm]

I am new to this environment, so distributed I believe.  There is a heavy forwarder, two search heads, an indexer, a server listed as console (which is the server we logon for searches) and another server of which I do not know what it does (simply named DDMD).

I have added new indexes and inputs on the main server, but they are showing no events.

I have read I also need to add the indexes to the indexer, when trying to do this, I cannot select the same custom app for indexes that all the others on that server are using.

[isoutamo]

Hi

here https://docs.splunk.com/Documentation/Splunk/8.2.4/InheritedDeployment/Introduction is excellent guide to get familiar with your environment. Based on it, you should get clear understand what you have.

If/when you have a distributed environment there are (as you told) several servers with different roles like search head, indexer(s),  manager node (if there is indexer cluster), heavy forwarders, UF and maybe DS (deployment server), LM (license manager, could be some other server as additional role) and MC (monitoring console). If you have monitor console on place you can use it as getting topology of your environment.

When there are separate search head (where you normally log with GUI) and indexer(s) and/or MN then you must add index definitions to indexer peers or if you have indexer cluster then into manager node and then deploy those to peers.

r. Ismo