Meni Berger

Hello to all, I recently installed psmatching3.04 on my IBM SPSS Statistics 25.0. I Then try to use psmatching on my data set. the data is full and does not contain missing values, non the less I get this strange error message: Error Messages psmatching3(...): Missing values in dataset. No missing value is allowed in the dataset even when missing in unused variables. Subsamples (all cases) does anyone have a clue regarding the source of this message or how to correct it? thanks!