Hi Pierangelo, Thanks for your rapid and efficient answers. Below you find my answers.
1) In the slapo-rwm man page I read : "This overlay is experimental." But in the slapd-meta man page there is no such text. So I thought that the rwm feature in this backend is stable.
2) For the crash of the overlay rwm you are right. It is now fixed. I encountered exactly the problem explained in ITS 5923 and fixed in RE24.
3) For the crash of back-meta the diagnostic is very simple : back-meta does not recocnize the LDAP_RES_INTERMEDIATE response type. So it provokes a crash by asserting (0) in the line 1460 of ./back-meta/search.c in release 2.4.13, giving the follwing message :
read1msg: ld 0x9f29550 msgid 2 message type intermediate slapd: search.c:1460: meta_back_search: Assertion `0' failed. Abandon
I will submit an issue on this topic next week after testing with RE24.
Best Regards Ali