Symptoms

A typical Ponemah file is called like this:
C:\Ponemah_Data\ExperimentName\ExperimentName.SubjectName.DateAndTime.PnmWav

The experiment name should not contain dots, so a correct example would be:
C:\Ponemah_Data\Experiment_1\Experiment_1.MickeyMouse.20180913115021.PnmWav

If periods (.) have been used in the experiment name, Ponemah will still handle the data correctly, but NeuroScore will be confused. Subjects will not be listed by NeuroScore in the Select Recording dialog making it impossible to open the data from a particular subject.

Workaround

For example, for the experiment name of: EEG.EMG.Ha.Trial1

As a first step, make a backup copy of the data.

Then rename the experiment folder name and all file names from " EEG.EMG.Ha.Trial1" to "EEGEMGHaTrial1":

This will allow you to open a single animal at a time in NeuroScore:

Suppose the following subjects were recorded in Ponemah:

We can see from the file names which channel indexes each animal has:

The channels will be ordered in the same way as they were ordered in Ponemah:

So the channel indexes for this example would be as follow:

The channels can be renamed correctly in NeuroScore.