LAS\WRITE [Observation] Writes the observation in the R buffer onto the output file. If a ver- sion of this observation is already in the file, a new version of the observation is created. A new observation number can be specified as ar- gument. The information written depends on the operations done on the observation. Existing fit results are written. The calibration informa- tion is written only if the calibration is checked (see SET CALIBRATION command). In the case of (old) on-the-fly data, WRITE automatically splits the da- ta into records with entry numbers starting at 1 unless the observation number of the first record is given explicitly. The behaviour depends on the "File Type" (see FILE command). For files of type MULTIPLE, a new version of the spectrum is written if the Obser- vationNumber already exists in the file. For files of type SINGLE, the ObservationNumber is automatically set to the next one available in the file. If an ObservationNumber is specified in the command, WRITE checks if it already exists. If so, it returns an error; if not, it attributes the specified ObservationNumber to the written spectrum.