java - FileAlreadyExistsException with REPLACE_EXISTING option -

inside code there loop substitute file file.

this done with:

java.nio.file.files.move(path source, path target, copyoption... options) throws ioexception 

the following exception thrown:

exception in thread "main" java.nio.file.filealreadyexistsexception: c:\brute-force\test-loads-2-forces-only.dat.temp -> c:\brute-force\test-loads-2-forces-only.dat     @ sun.nio.fs.windowsexception.translatetoioexception(unknown source)     @ sun.nio.fs.windowsexception.rethrowasioexception(unknown source)     @ sun.nio.fs.windowsfilecopy.move(unknown source)     @ sun.nio.fs.windowsfilesystemprovider.move(unknown source)     @ java.nio.file.files.move(unknown source) (*) @ bruteforce.main.changevalue(main.java:260)     @ bruteforce.main.main(main.java:71) 

the line @ exception thrown:

(*) @ bruteforce.main.changevalue(main.java:260):  files.move(path, path.resolvesibling("destiny_file"), replace_existing); 

javadoc defines exception:

... filealreadyexistsexception - if target file exists cannot replaced because replace_existing option not specified (optional specific exception)  ... 

the code specifies replace_existing.

also option imported @ beginning of file:

import static java.nio.file.standardcopyoption.replace_existing; 

any hint?

it due computer (or hdd) hybernates or similar? have set enegy options not suspends while using power grid.

thanks in advance