Dear colleagues, I have a ?.mtz file from integration with missing info about the space group in the SYMINFO. I tried to modify the file with combat and mtzutils, but it always ends up in reading the original file with this message: Failed to find spacegroup in SYMINFO! MTZUTILS: Fatal error in ccp4spg_register_by_symops MTZUTILS: Fatal error in ccp4spg_register_by_symops Here is report from mtzdump: Failed to find spacegroup in SYMINFO! MTZDUMP: Fatal error in ccp4spg_register_by_symops I know the correct space group, but I do not know how to supply the .mtz file. Any suggestion, please? Thanks for all of them. Best Regards, Petr Petr Kolenko [log in to unmask]