2024.01.31 V0520 "nf"-format is supported as GMT netCDF format. Note that the format may vary across different domains, but the file format for a single domain must be consistent. A friction term is added to the boundary calculation of the flow rate (contributed by M.Minami @ MRI. Thanks!). If you want to disable this modification, specify "-DOLD_SCHEME" on Makefile and make again. Performance optimizations for NEC SX-Aurora TSUBASA are applied. The following DEBUGs are applied. Fixed a bug that values were not updated at the four corners of the root domain (contributed by M.Minami @ MRI. Thanks!). A bug for the flow-rate to velocity conversion during linear calculation to outputting velocity grid file is corrected (contributed by H.Tsushima @ MRI. Thanks!). Typos are corrected (contributed by T.Miyashita @ Kyoto Univ. Thanks!). Uninitialized references on Kajiura-filter application are corrected. Other minor bugs are corrected.