Use this variable to prevent the accumulation of 0 byte files when using format specifiers such as %p (to include the process id) in the error file name. When this variable is set to 1 (on, true, yes), the runtime deletes its error file if the runtime has never written to that file. Note that on some operating systems, if your error file is shared by multiple processes (i.e., the file name does not include the process id or some other unique session information), setting A_REMOVE_EMPTY_ERROR_FILE to 1 may cause error messages to be lost. For example, on UNIX if the error file is empty when one runtime exits, that runtime would delete the file. The file will remain deleted even if another runtime process subsequently writes a message to it. The default value for this variable is 0 (off, false, no).