CLOSEFVWRITE accepts a variable or user-variable address that contains the location of a virtual buffer which has been used for writing, and the file-pointer associated with the buffer. If the FREEBYTE-counter for the memory-block is non zero indicating data is present, it is written to the file. Then, the memory-block serving as the buffer will be freed, and the var-address will be cleared. See chapter on File I/O. Related Words: OPENFV F, FREEBYTE