slapcat -F failing to backup

Hello;

I am running an older version of openldap and having issues in our production environment. We would backup our openldap db by running

slapcat -F /etc/openldap/slapd.d/

Recently htat backup fails and causes issues with our ldap db.

[root@l900pldp01v ~]# slapcat -F /etc/openldap/slapd.d/ ch_calloc of 1 elems of 800000008 bytes failed slapcat: ../../../servers/slapd/ch_malloc.c:107: ch_calloc: Assertion `0' failed. Aborted

When I run this same command in our test system the backups succeed. Any ideas on what the error is talking about?

Thank you Mike M