[SQL Anywhere 12.0.1.4086] Assertion failed

Hello,

the following exception occured while trying to connect to database:

*** FEHLER *** Assertierung fehlgeschlagen: 200130 (12.0.1.4086)[MC500]

Invalid page found in index

If Sybase Central is used to connect to DB, the following additional information is given:

[Sybase][ODBC Driver][SQL Anywhere]Interner Datenbankfehler *** FEHLER *** Assertierung fehlgeschlagen: 200130 (12.0.1.4086)[MC500]

Invalid page found in index - Transaktion wurde zurückgesetzt

  SQLCODE=-301

  SQLSTATE=HY000

What does it mean and how can it be repaired?

Best regards,

Wolfgang

(By the way: entering Data with Internet Explorer was not possible on this site)