library problem: several 'arch' folder is no longer supported errors

ver. 1.6.5 (with ESP board libraries added)
when compiling different sketches I get several similar error messages about 'arch' folder problems and apparent duplicate functions in some folders:

Invalid library found in C:\Users\Stew\Documents\Arduino\libraries\SD: Library can't use both 'src' and 'utility' folders.
Invalid library found in C:\Users\Stew\Documents\Arduino\libraries\Servo: 'arch' folder is no longer supported! See http://goo.gl/gfFJzU for more information

I have tried to figure out what they are saying on the goo site mentioned in the error message, but I can't understand what to do to correct the problems.

Can anyone help me fix the library problems?

Stew

stewl:
Invalid library found in C:\Users\Stew\Documents\Arduino\libraries\Servo: ‘arch’ folder is no longer supported! See http://goo.gl/gfFJzU for more information

I’m also getting this message and I did not find an answer in this thread. I will continue to look. However, help would be appreciated.

I’m also getting

<<<<<<<<<<<<<<

Arduino: 1.6.6 (Windows 10), Board: “Arduino/Genuino Uno”

Warning: platform.txt from core ‘Arduino ARM (32-bits) Boards’ contains deprecated recipe.ar.pattern="{compiler.path}{compiler.ar.cmd}" {compiler.ar.flags} {compiler.ar.extra_flags} “{build.path}/{archive_file}” “{object_file}”, automatically converted to recipe.ar.pattern="{compiler.path}{compiler.ar.cmd}" {compiler.ar.flags} {compiler.ar.extra_flags} “{archive_file_path}” “{object_file}”. Consider upgrading this core.
‘arch’ folder is no longer supported! See http://goo.gl/gfFJzU for more information

Error compiling.
Invalid library found in C:\Users\Wayne\Documents\Arduino\libraries\Servo: ‘arch’ folder is no longer supported! See http://goo.gl/gfFJzU for more information
Invalid library found in C:\Users\Wayne\Documents\Arduino\libraries\Servo: ‘arch’ folder is no longer supported! See http://goo.gl/gfFJzU for more information

This report would have more information with
“Show verbose output during compilation”
enabled in File > Preferences.

Thanks.

I was using the 1.6.6 IDE but uninstalled it and installed 1.6.5. I also deleted the arch folder in the path. I now get the following error:

<<<<<<<<<<<<<<<<<<<<

Arduino: 1.6.5 (Windows 8.1), Board: “Arduino Due (Programming Port)”

Build options changed, rebuilding all

arm-none-eabi-gcc: error: C:\Users\Wayne\AppData\Local\Temp\build2536407110830694732.tmp/core/syscalls_sam3.c.o: No such file or directory
Error compiling.

This report would have more information with
“Show verbose output during compilation”
enabled in File > Preferences.

Thanks for any help you can provide.

OK, I have the solution, thanks to an off-line friend. Thanks, Scott!

We used Revo Uninstaller to completely remove version 1.6.6 and 1.6.5 and installed version 1.6.4.

Hopefully, this will help you if you have this problem.