AMOEBA procedures and functions are used to fit parameters of hierarchical stellar system models to data from interferometry, astrometry, spectroscopy, and photometry (not implemented yet). The data from the latter three methods are read from formatted ASCII files and stored in structure arrays. Interferometric data, however, can only be stored in the scans structure one night at a time due to the complexity of the data and the varying configurations. Therefore, the different nights are buffered by a C-function (nightbuffer), from which data can be loaded. If some currently loaded data have been manipulated, they have to be stored in the buffer (storenight) for AMOEBA routines to load the new data. A general exception has been implemented which does not load data from the buffer if the buffer has only one night stored.