Problem:

Audiogram actions saved by an earlier version of Koalys (from 2019) will in some situations be stored in UTF-16, causing the legacy format conversion to fail. If a fitting module then attempts to read the data in a legacy format, the audiogram is empty. The Noah Audiogram Module and Noah System can still display the audiogram since they do not use the legacy format.

Solution

Upgrade to the current version of Koalys.