Hi, I am using 4.0.x branch(#fed87e6406e291d472c20a5cabbe7324ce7148f2). dhcp site file: recv DHCP-Discover { ... $INCLUDE ${raddbdir}/dhcp-subconfigs/devstack01/ut/subconfigs_discover/ ... } recv DHCP-Request { ... $INCLUDE ${raddbdir}/dhcp-subconfigs/devstack01/ut/subconfigs_request/ ... } recv DHCP-Inform { ... $INCLUDE ${raddbdir}/dhcp-subconfigs/devstack01/ut/subconfigs/ ... } recv DHCP-Release { ... $INCLUDE ${raddbdir}/dhcp-subconfigs/devstack01/ut/subconfigs/ ... } All these ${raddbdir}/dhcp-subconfigs/devstack01/ut/subconfigs*/ directories have same files in them. subconfigs: 1_biz.cfg 2_res.cfg 3_vut.cfg 4_sim.cfg 5_ut.cfg 6_simut.cfg subconfigs_discover: 1_biz.cfg 2_res.cfg 3_vut.cfg 4_sim.cfg 5_ut.cfg 6_simut.cfg subconfigs_request: 1_biz.cfg 2_res.cfg 3_vut.cfg 4_sim.cfg 5_ut.cfg 6_simut.cfg If directory names are different (but same files in them), INCLUDE works without any problem. But if I include same directory twice it segfaults. radius debug output: # /usr/sbin/radiusd -X Info : FreeRADIUS Version 4.0.0 Info : Copyright 1999-2019 The FreeRADIUS server project and contributors Info : There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A Info : PARTICULAR PURPOSE Info : You may redistribute copies of FreeRADIUS under the terms of the Info : GNU General Public License Info : For more information about these matters, see the file named COPYRIGHT Info : Starting - reading configuration files ... Debug : Including dictionary file "/etc/raddb/dictionary" including configuration file /etc/raddb/radiusd.conf including configuration file /etc/raddb/clients.conf Including files in directory "/etc/raddb/mods-enabled/" including configuration file /etc/raddb/mods-enabled/redis including configuration file /etc/raddb/mods-enabled/redis_ippool including configuration file /etc/raddb/mods-enabled/ldap including configuration file /etc/raddb/mods-enabled/linelog_dhcp including configuration file /etc/raddb/mods-enabled/dhcpv4 including configuration file /etc/raddb/mods-enabled/always including configuration file /etc/raddb/mods-enabled/expr Including files in directory "/etc/raddb/policy.d/" including configuration file /etc/raddb/policy.d/abfab-tr including configuration file /etc/raddb/policy.d/accounting including configuration file /etc/raddb/policy.d/canonicalization including configuration file /etc/raddb/policy.d/control including configuration file /etc/raddb/policy.d/cui including configuration file /etc/raddb/policy.d/debug including configuration file /etc/raddb/policy.d/dhcp including configuration file /etc/raddb/policy.d/eap including configuration file /etc/raddb/policy.d/filter including configuration file /etc/raddb/policy.d/operator-name including configuration file /etc/raddb/policy.d/time including configuration file /etc/raddb/policy.d/vendor Including files in directory "/etc/raddb/sites-enabled/" including configuration file /etc/raddb/sites-enabled/dhcp Loaded module "proto_dhcpv4" Including files in directory "/etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_discover/" including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_discover/1_biz.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_discover/2_res.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_discover/3_vut.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_discover/4_sim.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_discover/5_ut.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_discover/6_simut.cfg Including files in directory "/etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_request/" including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_request/1_biz.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_request/2_res.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_request/3_vut.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_request/4_sim.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_request/5_ut.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs_request/6_simut.cfg Including files in directory "/etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs/" including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs/1_biz.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs/2_res.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs/3_vut.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs/4_sim.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs/5_ut.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs/6_simut.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack08/ut/main.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack10/ut/main.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack01/host/main.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack08/host/main.cfg including configuration file /etc/raddb/dhcp-subconfigs/devstack10/host/main.cfg including configuration file /etc/raddb/dhcp-subconfigs/vasn-stackids-switch.out Including files in directory "/etc/raddb/dhcp-subconfigs/devstack01/ut/subconfigs/" CAUGHT SIGNAL: Segmentation fault Backtrace of last 8 frames: /usr/lib64/freeradius/libfreeradius-util.so(fr_fault+0x1ae)[0x7f0136607c2e] /lib64/libpthread.so.0(+0xf5f0)[0x7f0134e595f0] /lib64/libc.so.6(fgets+0x1b)[0x7f013467396b] /usr/lib64/freeradius/libfreeradius-server.so(cf_file_read+0x30e)[0x7f0136ccf9de] /usr/lib64/freeradius/libfreeradius-server.so(main_config_init+0x223)[0x7f0136ce8573] /usr/sbin/radiusd(main+0x526)[0x4040d6] /lib64/libc.so.6(__libc_start_main+0xf5)[0x7f0134627505] /usr/sbin/radiusd[0x404d6d] No panic action set _EXIT(139) CALLED src/lib/util/debug.c[920]. Last error was: Invalid attribute reference, missing '&' prefix Regards, Nagamani Chinnapaiyan