See the following for more detailed help on the Advanced tab:
This option controls whether DCEM creates a command specification to run a command on hosts where the command did not complete successfully. The command specification contains all the information from the original command specification, except that the list of target hosts includes only those hosts on which the command was initially unsuccessful. To rerun the command on these specific hosts:
This option allows the user to specify the maximum number of directories that can be created on the managing server for storing command specification reports. Once this maximum is reached, DCEM stops creating additional reports, and a message is displayed when a command is run indicating that a command execution can't complete until specified action is taken. To resume report creation, delete report directories that are no longer needed or increase the maximum number of directories allowed.