Using SugarCRM Professional, Version 8.3.0 (Build 149) (Winter '19)
The current versions 8.3 and 9.0 do not support reporting on Comment Logs.
This is logged already as Bug #82070 in the support area.
Harald Kuske Principal Solution Architect – Professional Services, EMEAhkuske@sugarcrm.comSugarCRM Deutschland GmbH
