Three years or longer, limitation threatens, check suspension and any declaratory judgment.
If three years have passed since knowledge of the loss and the liable person, limitation under section 1489 ABGB threatens. Whether the period has actually expired depends on the exact start and on possible suspensions, for instance through settlement negotiations. If a declaratory judgment already exists, the longer period of 30 years applies. A swift legal review is urgent here.
Next steps: clarify the exact start of the period, check suspension grounds and any declaratory judgment and lose no time.