I had a similar error, but it seemed in my case to be due to a specific repository having issues with the availability of AMD64 software, rather than "too many repositories" in general. Here was my error for comparison:
E: Dynamic MMAP ran out of room.
E: Error occurred while processing kerberos4kth-kdc (NewVersion1).
E: Problem with MergeList /var/lib/apt/lists
archive.ubuntu.com_ubuntu_dists_hoary_universe_binary-amd64_Packages
E: The package lists or status file could not be parsed or opened
After that error occurred, it would not display packages. But removing that repository fixed the issue for me. Note: I am running Dapper Drake Flight 3 on a recently fresh install.
I had a similar error, but it seemed in my case to be due to a specific repository having issues with the availability of AMD64 software, rather than "too many repositories" in general. Here was my error for comparison:
E: Dynamic MMAP ran out of room. ubuntu. com_ubuntu_ dists_hoary_ universe_ binary- amd64_Packages
E: Error occurred while processing kerberos4kth-kdc (NewVersion1).
E: Problem with MergeList /var/lib/apt/lists
archive.
E: The package lists or status file could not be parsed or opened
After that error occurred, it would not display packages. But removing that repository fixed the issue for me. Note: I am running Dapper Drake Flight 3 on a recently fresh install.