Hi Daniel
In the Introduction to Parsing documentation (found in FLEx from Help / Resources), in section 3.2.1 it says (bold mine):
(111)
a.
perpustakaan
‘library’
b.
perpustakaan-perpustakaannya
‘his libraries’Notice the ‑nya suffix which comes after the reduplicated stem. The way we are modeling full reduplication in FieldWorks Language Explorer, the root must be at one end and then any affixes (including the reduplication morpheme) must either be all prefixes or be all suffixes.[47] Thus, in modeling examples (110)‑(111), we would make the reduplication morpheme be a suffix.
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Thus, I think that you cannot use a circumfix, but you need to consider if the reduplication can be considered to be a suffix, and then the root will be first, followed by the two suffixes (reduplication and the -an).
Sara