diff --git a/createfilter/main.go b/createfilter/main.go
index cf36d31..43c2d1c 100644
--- a/createfilter/main.go
+++ b/createfilter/main.go
@@ -193,6 +193,9 @@ func DetectDateFinEffectif(path string, nIgnoredCols int) (dateFinEffectif time.
 	nbColsToExclude := guessLastNMissingFromReader(r, nIgnoredCols)
 	lastColWithValue := len(header) - 1 - nbColsToExclude - nIgnoredCols
 	lastPeriodWithValue := header[lastColWithValue]
+	log.Printf("nbColsToExclude: %d\n", nbColsToExclude)
+	log.Printf("lastColWithValue: %d\n", lastColWithValue)
+	log.Printf("lastPeriodWithValue: %s\n", lastPeriodWithValue)
 	return effectifColNameToDate(lastPeriodWithValue)
 }