Depending upon whether you are using a process engine in testing mode or a deployed process engine, the logs are stored in different locations. During test mode, the logs are stored in the TIBCO ActiveMatrix BusinessWorks working directory under the logs subdirectory. See TIBCO Designer User’s Guide for more information about specifying the working directory. For deployed process engines, the log location is specified by custom engine properties. See TIBCO ActiveMatrix BusinessWorks Administration for more information about custom engine properties.