This can be done by overriding ecf jobout variable. Here we use date/time to give a unique name to the job out files.
For local job out
task t cron 00:00 11:59 00:10 edit ECF_JOBOUT %ECF_HOME%%ECF_NAME%/%ECF_DATE%-%TIME%.%ECF_TRYNO%
ECF_OUT variable should be used in situations where job output, is not located in the same directory as job files.
This is necessary for remote job submission when local and remote hosts do not share a common file system.
remote job out
task t cron 00:00 11:59 00:10 edit ECF_JOBOUT %ECF_OUT%%ECF_NAME%/%ECF_DATE%-%TIME%.%ECF_TRYNO%