Cell codes have a standard format determined by your system administrator, and are unique when generated. Cell codes can be edited. Therefore, they are not checked for uniqueness unless the flowchart configuration property AllowDuplicateCellCodes is False, in which case cell codes are enforced to be unique only within the current flowchart. There is no checking for uniqueness in the target cell spreadsheet (TCS). For details about cell codes and cell code generators, see the Campaign Administrator's Guide.

For example, if a Segment process generates two output cells named Segment1 and Segment2, and these cells are used as input into two Mail List processes (Mail List 1 and Mail List 2), if you change the names of the Segment cells after you have already connected the Mail List processes, you need to understand how Campaign handles the new cell names.