Dear Yutaka,
I get an exception “Ran out of stack space trying to match the regular expression” in this case:
1: Search -> Find in Files…
2: Find: ^((?!<Landcode value=”NL”/>.)*$
3: Files Types: *.sm
4: In Folder: <whatever>
5: “Use Regular Expressions” and “Close when Finished”
6: Encoding: Configured Encoding
7: Output Options: Display Matched Lines Only
Thanks in advance!