[solved] how to pipe rli2 tot textfile?

[tibit]

..... also the general idea is that the first file you specify is the (sorted!) whole file and the second file is a (sorted!) subset of the whole file.

Thank you so much ... I did everything right, but ! I had put the whole file second instead of first.
When I put the bigger file first, it works like a charm.

Many thanks for this extra information
solved my question :-)