List refuse the variable

[smsmelbaron]

Dears,
please I need urgent supprt for attached error

[dora_paz (Dora)]

First initialize global variable to an empty list or string, then set variable to if … then …set

[Still-learning (1-2-3-4...)]

[dora_paz (Dora)]

Example this will work

This not

[smsmelbaron]

many thanks