“Contact Not Found In Address Book” When Viewing a Contact’s Details
When adding a contact to Clarus’ Contacts section, the contact is stored in your Mac’s Address Book. If the contact is deleted from your Address Book or you open your Clarus document on a computer that doesn’t contain that contact in it’s Address Book, the following warning will be displayed instead of the contact’s address and phone number details:

If the situation is temporary, don’t worry – Clarus will attempt to find the contact in your Address Book every time a document is opened. However, if you’ve created a new card with a different name for that contact, click the “Choose New Contact…” button to choose or create a new person in your Address Book. The Clarus contact will then be updated to reflect the new details.