[Asus Transformer TF700] elfaure:
http://smanager.wikidot.com/docs:smanager-manual#

I assume the posted errors are from a single script run wrt this evaluation.

What script version are you running? Make sure to check the radio button "is script" and NOT "is executable" and that SManager has root privileges in superSU (open superSU and make sure SManager is on the "grant" list). Set SM to browse as root in its advanced settings (mounts system rw althought this shoudn't be necessary but may be required to prompt superSU to toast a grant for SM). If you edited the script for any reason, you need to make sure to hit enter after the last script line in the code with an appropriate editor (needs to have a LF NOT a CR+LF as the EOF character).

Lets try to break it down (error messages).

*Your first error happens when you try to umount something not already mounted.

*Your second error is indicative of not running as root. That's the only time I've seen that error.

*Your third error happens when "rm -rf" fails because there are no files to remove from you cache directory for that browser (which is really not an error).

*Your last error is puzzling. If it were already mounted the error is "device or resource busy" or none at all. I've never seen your last error before but it is interesting how two lines before mount was not permitted indicating no su, then it was permitted but failed to find its target indicating running as su??? I think you may have a corrupt su!

[MENTION=4878287]_that[/MENTION] and/or [MENTION=2446267]becomingx[/MENTION] should look at this and confirm my evaluation.

Don't think it can't happen - I've had it happen twice with superSU and now I run superuserpro (Robert N...). My indication was my ATE root prompt would just disappear. Both times I had superSU installed "as a system app" which just moves it from /system/xbin to system/bin I believe but it went South twice. I don't think I've had a problem with it installed as a non-system app. Anyway me and Chainfire su installed as system app do not get along. Normal user prompt was fine but as soon as I'd su the prompt would go away and leave just the blinking cursor. You might try to open superSU and see if it prompts you to update its binaries and if it does let it then try SManager again.

It would help if you could run the script from the terminal not SManger and post the output. The errors in SM are different that the errors displayed on the ATE app and that's what I am most familiar with wrt troubleshooting. I only use SM to run it as root at boot.

If you are running it as su, I've seen similar errors when I ran the script more than once or tried to unmount the cache for a running browser (specifically Chrome). Get the umount_all.sh script and run that in between autostart#.sh runs if you need to run it more than once (which you shouldn't have to do). But if you do you can create duplicate double mountpoints in some cases. And interestingly if the script generates errors the first time you run it and then you run it again the errors go away for some reason. I've seen that too. ([Edit] Reason is first time script runs there are no mounts to umount so it errors on umount. Second time there are mounts to unmount so no errors are generated.) Beware there is a umount for Opera Mobile in the umount script but no corresponding mount for Opera Mobile in the autostart script so this will error every time. I was planning to add that in the next rev if I release one. Post your output and I'll better be able to help you, or if I can't most others here can make sense of it and why it might be failing for you.

Run this code at the terminal after running the script as su in SManager or preferrably the terminal and post your output. If you can run the script from the terminal as su that would be better.

mount | grep _cache

And post your output