Symptoms

Unable to list APS applications for a domain:

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Log file /var/log/sw-cp-server/error_log contains the following record:

ERR (3): APS Catalog error: Unable to define main IP address

Cause

No "main" IP address in Plesk database:

mysql> select id, ip_address, main from IP_Addresses;
+----+-----------------+-------+
 | id | ip_address     | main  |
 +----+----------------+-------+
 |  1 | 10.10.10.10    | false |
 |  2 | 20.20.20.20    | false |
 +----+----------------+-------+

Resolution

Reread the IP addresses from Plesk at Tools and Settings > IP addresses , or run the following command:

# /usr/local/psa/bin/ipmanage --reread