the power supply was off and the job stopped.So,can i start again the job from where it stop?
Most rosetta executables will detect what number of -nstruct they were on, and restart there. Not all executables will. A few do more complex checkpointing; generally only on the BOINC Rosetta@HOME system.
im using rosetta abrelax.so,is it possible for me to start with number of structure they stopped?
It ought to, yes.
can i know what is the script should i added into the flags file i use?
It's automatic. If you are outputting as PDBs, then you should have a lot of PDBs in the directory already, like (myresult)_0001.pdb, (myresult)_0002.pdb, etc. If you are outputting into a silent file, there will be a file silent.out (or default.out, or something) with a bunch of outputs in it already. Rosetta will see those outputs already exist if you restart it with the same options as before and pick up where it left off.
If you want it to NOT start where it stopped, but instead start over, you'd use the -overwrite flag. That's the opposite of what you want.
success..thank you very much