Can't See Completion Summary Tab

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Any ideas as to why we can’t see the Completion Summary tab on topic pages in one of our courses?  This course has just one module. The module that has 7 topic items (4 web pages, 1 scorm object, 1 quiz and 1 survey). 6 topics are set for automatic completion and 1 topic (the survey) is set as not required.  We can see the Completion Summary tab in other courses, so we don’t know what’s going on in this particular course.  Thanks in advance for any help.

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