This article will direct you to the log file locations of different software.
Core 1.3.0.54 and earlier
"C:\Users\[user name]\Documents\IO Industries\DVR Express\Core\Logs\core_api_log.txt"
"C:\Users\[user name]\Documents\IO Industries\DVR Express\Core\Logs\core_view_log.txt"
Core 2.0.0.0 and later
"C:\ProgramData\IO Industries\DVR Express\Core\Logs\core_api_log.txt"
"C:\ProgramData\IO Industries\DVR Express\Core\Logs\core_data_recovery_log.txt"
"C:\ProgramData\IO Industries\DVR Express\Core\Logs\core_file_service_log_x64.txt"
"C:\ProgramData\IO Industries\DVR Express\Core\Logs\core_max_server_log.txt"
"C:\ProgramData\IO Industries\DVR Express\Core\Logs\core_view_log.txt"
Flare
"C:\ProgramData\IO Industries\Flare\Logs\flare_cl_cx.txt"
"C:\ProgramData\IO Industries\Flare\Logs\flare_isp.txt"
"C:\ProgramData\IO Industries\Flare\Logs\flare_sdi.txt"
Redwood
"C:\ProgramData\IO Industries\Redwood\redwood_control.log"
"C:\ProgramData\IO Industries\Redwood\redwood_cxp_config.log"
"C:\ProgramData\IO Industries\Redwood\redwood_firmware_update.log"
8KSDI
"C:\ProgramData\IO Industries\8KSDI\8ksdi_control.log"
StudioCap
"C:\ProgramData\IO Industries\StudioCapClient\StudioCapClientLog.txt"
"C:\ProgramData\IO Industries\StudioCapServer\StudioCapServerLog.txt"
StudioCap-VC
"C:\ProgramData\IO Industries\Volucam\volucam_api.log"
"C:\ProgramData\IO Industries\Volucam\volucam_export_server.log"
"C:\ProgramData\IO Industries\Volucam\volucam_studiocap-vc.log"
Victorem
"C:\ProgramData\IO Industries\Victorem\Logs\victorem_cx_log.txt"
"C:\ProgramData\IO Industries\Victorem\Logs\victorem_isp_log.txt"
"C:\ProgramData\IO Industries\Victorem\Logs\victorem_sdi_log.txt"