Hi,I'm going to output the ROSINFO,ROSWARN,ROSERROR,ROSFATAL infomation to log file ,so I set output="log" in launch file,but I found that only ROSINFO and ROSWARN information was written to the log file,ROSERROR and ROSFATAL information did not exis. I'm using ros indigo version, does anyone encounter this problem? Thx a lot