This is false many times over. Read the 54 pages of the House Select Committee's final report (Section IV) regarding compliance: congress.gov/114/crpt/hrpt8…
The word "withheld" appears several times.
One example:
DOD withholding 54 pages of relevant documents based on an assertion of ‘‘longstanding Executive Branch interests.’’
State Department informed the Committee ‘‘a small number of documents’’ were being withheld because of ‘‘executive branch confidentiality interests.’’ The...basis for withholding the documents was a concocted administrative privilege—one made up entirely by the Admin