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A binary file of OCAF document contains file-position of several sections (header section, shape section). This file-position represents an integer value. For document files of less than 2Gb it is enough to use "int" type to keep the file-position. But for greater document files we need more digits. The fix consists in extension of the type for keeping of file-position within the document file on disk: it was "int", now it is "uint64_t".