Diagnosis
The minimum number of historical values necessary for modelinitialization is greater than the number that has been given. Thenumber required depends on the individual forecast model:
Model,, ,,Number of past time values
Constant model,, ,, ,,1
Trend model,, ,, ,,3
Seasonal model,, ,, ,,1 season
Seasonal trend model,, ,, ,,1 season + 3
2nd order exp. smoothing,, ,, ,,3
Moving average,, ,, ,,1
Weighted moving average,, ,, ,,1

Procedure
Manually fill in the historical values.