--- src/main/java/hudson/plugins/sshslaves/SSHLauncher.java.orig	Sun Jul 18 21:03:28 2010
+++ src/main/java/hudson/plugins/sshslaves/SSHLauncher.java	Sun Jul 18 20:53:48 2010
@@ -586,7 +586,16 @@
                 sftpClient = new SFTPv3Client(connection);
                 sftpClient.rm(fileName);
             } catch (Exception e) {
-                e.printStackTrace(listener.error(Messages.SSHLauncher_ErrorDeletingFile(getTimestamp())));
+                if (sftpClient == null) {
+                    /* system without SFTP */
+                    try {
+                        connection.exec("rm " + fileName, new NullStream());
+                    } catch (Exception e2) {
+                        e2.printStackTrace(listener.error(Messages.SSHLauncher_ErrorDeletingFile(getTimestamp())));
+                    }
+                } else {
+                    e.printStackTrace(listener.error(Messages.SSHLauncher_ErrorDeletingFile(getTimestamp())));
+                }
             } finally {
                 if (sftpClient != null) {
                     sftpClient.close();