66: Too many Aneamal files included
The number of Aneamal files processed for a single document is limited to 256. This includes linked Aneamal files and implied files like @header.nml, but does not count embedded Aneamal files and quotation blocks. The main reason for this limit is to prevent infinite recursion, e.g. if one file includes itself, including itself again and again and again …
Make sure you do not create a loop by linking a file to itself for automatic inclusion, either directly or indirectly through a chain of files.