Notes crash dump

I running a large notes database named the metrology web citation index. I scan about 1600 websites in the field of metrology.

But now when I start a search on a notes client the notes server is crasching and a dump is available

When I do a search on a web client using the exploirer I have no dump but what I see is that not all document are found. This is a big problem for the users

I removed the full text index and dit a complete new rebuild but that is not helping. I removed all the views and that is also not helping

I made a copy using the new replica and that has no result

The database is large but it contains only 210000 documents

What can I do to find a sollution for this problem

John Nivard