When you browse through your document, you may find that content that you expect to be included is not. Missing content is usually caused by one of two reasons. One reason may be that the missing content exists in an item or part type that is not included in the Report XML definition for the document you have selected. 

For example, if you add Design requirements to an item structure and the definition for the document you have selected is not configured to include Design requirements, the information will not appear in the document output. 

Another reason may be that you do not have access rights to the items containing the "missing" information. This could explain, for example, why one user can see the content, but another user cannot. Only items to which the current user generating the document has access will be included in the document. 

Contact your system Architect to inquire about missing content.