I've tried a few times to import 537 Word docs (2,974) from a
RH for Word project (RH X5 for Word, CHM output) into a new RH HTML
5 project. Each time, RH HTML "hangs" and I've seen "out of memory"
at least once at the very end. The original RH for Word project has
conditional build tags defined, but only one tag has been assigned
to one topic, so far. We've never been able to build an index in
this RH for Word project (it's mostly blank), but we've built a
search and contents without problems.