Hi, When I soft link raddb/mods-available/sql to raddb/mods-enabled/sql, and comment out $INCLUDE mods-enabled/sql in raddb/radiusd.conf, I get the below debug output, ending in a segmentation fault. The only other changes I have made since compiling were to set the dialect and database connection details in raddb/mods-available/sql. I've read each file that I've modified, and I'm unsure what is causing this issue. I'm using git to manage my changes, so can go back to the very beginning easily if I need to. Debug output: 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/freeradius/raddb/dictionary" Debug : including configuration file /etc/freeradius/raddb/radiusd.conf Debug : including configuration file /etc/freeradius/raddb/clients.conf Debug : including configuration file /etc/freeradius/raddb/mods-enabled/sql Debug : including configuration file /etc/freeradius/raddb/mods-config/sql/driver/mysql Debug : including configuration file /etc/freeradius/raddb/mods-config/sql/main/mysql/queries.conf Debug : Including files in directory "/etc/freeradius/raddb/mods-enabled/" Debug : including configuration file /etc/freeradius/raddb/mods-enabled/always Debug : including configuration file /etc/freeradius/raddb/mods-enabled/attr_filter Debug : including configuration file /etc/freeradius/raddb/mods-enabled/cache_eap Debug : including configuration file /etc/freeradius/raddb/mods-enabled/chap Debug : including configuration file /etc/freeradius/raddb/mods-enabled/client Debug : including configuration file /etc/freeradius/raddb/mods-enabled/delay Debug : including configuration file /etc/freeradius/raddb/mods-enabled/detail Debug : including configuration file /etc/freeradius/raddb/mods-enabled/detail.log Debug : including configuration file /etc/freeradius/raddb/mods-enabled/digest Debug : including configuration file /etc/freeradius/raddb/mods-enabled/dhcpv4 Debug : including configuration file /etc/freeradius/raddb/mods-enabled/echo Debug : including configuration file /etc/freeradius/raddb/mods-enabled/escape Debug : including configuration file /etc/freeradius/raddb/mods-enabled/exec Debug : including configuration file /etc/freeradius/raddb/mods-enabled/expiration Debug : including configuration file /etc/freeradius/raddb/mods-enabled/expr Debug : including configuration file /etc/freeradius/raddb/mods-enabled/files Debug : including configuration file /etc/freeradius/raddb/mods-enabled/linelog Debug : including configuration file /etc/freeradius/raddb/mods-enabled/logintime Debug : including configuration file /etc/freeradius/raddb/mods-enabled/mschap Debug : including configuration file /etc/freeradius/raddb/mods-enabled/ntlm_auth Debug : including configuration file /etc/freeradius/raddb/mods-enabled/pap Debug : including configuration file /etc/freeradius/raddb/mods-enabled/passwd Debug : including configuration file /etc/freeradius/raddb/mods-enabled/radius Debug : including configuration file /etc/freeradius/raddb/mods-enabled/radutmp Debug : including configuration file /etc/freeradius/raddb/mods-enabled/soh Debug : including configuration file /etc/freeradius/raddb/mods-enabled/sradutmp Debug : including configuration file /etc/freeradius/raddb/mods-enabled/stats Debug : including configuration file /etc/freeradius/raddb/mods-enabled/unix Debug : including configuration file /etc/freeradius/raddb/mods-enabled/unpack Debug : including configuration file /etc/freeradius/raddb/mods-enabled/utf8 CAUGHT SIGNAL: Segmentation fault Backtrace of last 12 frames: /usr/local/lib/libfreeradius-util.so(fr_fault+0xe8)[0x7fe35056e6ec] /lib64/libpthread.so.0(+0xf5d0)[0x7fe34edc25d0] /lib64/libc.so.6(fgets+0x1b)[0x7fe34ea5483b] /usr/local/lib/libfreeradius-server.so(+0x15990)[0x7fe350c40990] /usr/local/lib/libfreeradius-server.so(+0x18216)[0x7fe350c43216] /usr/local/lib/libfreeradius-server.so(+0x165dc)[0x7fe350c415dc] /usr/local/lib/libfreeradius-server.so(+0x18216)[0x7fe350c43216] /usr/local/lib/libfreeradius-server.so(cf_file_read+0x23d)[0x7fe350c434b0] /usr/local/lib/libfreeradius-server.so(main_config_init+0x42c)[0x7fe350c62c8d] radiusd(main+0x95f)[0x404982] /lib64/libc.so.6(__libc_start_main+0xf5)[0x7fe34ea083d5] radiusd[0x403e09] No panic action set _EXIT(139) CALLED src/lib/util/debug.c[921]. Last error was: Not built with support for LSAN interface Warm Regards, Matthew McTague Head of Infrastructure, Reliance Networks d. +64 3 222 6013 t. 0800 483 882 (+64 3 683 9090) Website | Service Desk | Internet Services Reliance Networks Ltd accepts no liability for the content of this email, or for the consequences of any actions taken on the basis of the information provided, unless that information is subsequently confirmed in writing. Any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the company.