Permission denied when PDI use Put a file with SFTP

Hi All,

I use PDI 6.1 and when the job use Put a file with SFTP I got the following error message:

ERROR (version 6.1.0.1-196, build 1 from 2016-04-07 12.08.49 by buildguy) : Error while trying to send files. Exception :
3: Permission denied
Permission denied
ERROR (version 6.1.0.1-196, build 1 from 2016-04-07 12.08.49 by buildguy) : org.pentaho.di.core.exception.KettleJobException:
3: Permission denied
Permission denied

at org.pentaho.di.job.entries.sftp.SFTPClient.put(SFTPClient.java:261)
at org.pentaho.di.job.entries.sftpput.JobEntrySFTPPUT.execute(JobEntrySFTPPUT.java:887)
at org.pentaho.di.job.Job.execute(Job.java:723)
at org.pentaho.di.job.Job.execute(Job.java:864)
at org.pentaho.di.job.Job.execute(Job.java:864)
at org.pentaho.di.job.Job.execute(Job.java:864)
at org.pentaho.di.job.Job.execute(Job.java:864)
at org.pentaho.di.job.Job.execute(Job.java:864)
at org.pentaho.di.job.Job.execute(Job.java:864)
at org.pentaho.di.job.Job.execute(Job.java:864)
at org.pentaho.di.job.Job.execute(Job.java:864)
at org.pentaho.di.job.Job.execute(Job.java:545)
at org.pentaho.di.job.Job.run(Job.java:435)
Caused by: 3: Permission denied
at com.jcraft.jsch.ChannelSftp.throwStatusError(ChannelSftp.java:2491)
at com.jcraft.jsch.ChannelSftp._put(ChannelSftp.java:528)
at com.jcraft.jsch.ChannelSftp.put(ChannelSftp.java:480)
at org.pentaho.di.job.entries.sftp.SFTPClient.put(SFTPClient.java:259)


Does anyboday has any idea why does it happen, previously it worked properly for me?

Thanks in advance!
Pali