It 'appears that it's not possible to read an sqlite table (without geometry) with more than 50 000 records
var layer = new Mw.VectorLayer();
var res = layer.Open(table.fileName, table.name,true);
Mw.FeatureSet fs = (Mw.FeatureSet)layer.Data;
With 1 more, fs number of features is 0.
Could be this is fixed in recent version - to be verified