I am trying to use the stale after option available for buffers. A buffered QVD file is getting created when I am not using a where clause for an Excel based input file. However, if I want to reduce the data using a where clause, QVD is not getting created. However, if I use the same with a backend SQL Statement it works fine as expected. I tried searching QlikView help and community to understand the reason behind this, but could not find any info relevant to this. Can anybody help me understand this? Thanks.