Grub-Customizer error

grub configuration was updated along the system software update. From then I was unable to configure grub- to start my windows 10 as default OS

I need your /boot/grub/grub.cfg.new

Thank you for your response and sorry for the delay in responding due to email landing in 'junk' folder.
Please find attached here with grub.cfg.new.

Thanks and regards
S Sishtla

> Date: Fri, 25 Mar 2016 13:06:56 +0000
> From: <email address hidden>
> To: <email address hidden>
> Subject: [Bug 1561813] Re: Grub-Customizer error
>
> I need your /boot/grub/grub.cfg.new
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1561813
>
> Title:
> Grub-Customizer error
>
> Status in Grub Customizer:
> New
>
> Bug description:
> Failed saving grub configuration!
> Please take a look at the command line output below. If you think this is a bug of Grub Customizer, please create one at https://launchpad.net/grub-customizer! Generally Grub Customizer should prevent errors like this.
>
> failed running 'grub-mkconfig -o "/boot/grub/grub.cfg"' output:
> Generating grub configuration file ...
> Found linux image: /boot/vmlinuz-4.2.0-34-generic
> Found initrd image: /boot/initrd.img-4.2.0-34-generic
> Found linux image: /boot/vmlinuz-4.2.0-30-generic
> Found initrd image: /boot/initrd.img-4.2.0-30-generic
> Found linux image: /boot/vmlinuz-4.2.0-27-generic
> Found initrd image: /boot/initrd.img-4.2.0-27-generic
> Found linux image: /boot/vmlinuz-4.2.0-25-generic
> Found initrd image: /boot/initrd.img-4.2.0-25-generic
> Found linux image: /boot/vmlinuz-4.2.0-23-generic
> Found initrd image: /boot/initrd.img-4.2.0-23-generic
> Found linux image: /boot/vmlinuz-4.2.0-22-generic
> Found initrd image: /boot/initrd.img-4.2.0-22-generic
> Found linux image: /boot/vmlinuz-3.19.0-42-generic
> Found initrd image: /boot/initrd.img-3.19.0-42-generic
> Found Windows 10 (loader) on /dev/sda1
> Found Windows NT/2000/XP on /dev/sdc1
> Found linux image: /boot/vmlinuz-4.2.0-34-generic
> Found initrd image: /boot/initrd.img-4.2.0-34-generic
> Found linux image: /boot/vmlinuz-4.2.0-30-generic
> Found initrd image: /boot/initrd.img-4.2.0-30-generic
> Found linux image: /boot/vmlinuz-4.2.0-27-generic
> Found initrd image: /boot/initrd.img-4.2.0-27-generic
> Found linux image: /boot/vmlinuz-4.2.0-25-generic
> Found initrd image: /boot/initrd.img-4.2.0-25-generic
> Found linux image: /boot/vmlinuz-4.2.0-23-generic
> Found initrd image: /boot/initrd.img-4.2.0-23-generic
> Found linux image: /boot/vmlinuz-4.2.0-22-generic
> Found initrd image: /boot/initrd.img-4.2.0-22-generic
> Found linux image: /boot/vmlinuz-3.19.0-42-generic
> Found initrd image: /boot/initrd.img-3.19.0-42-generic
> Found memtest86+ image: /boot/memtest86+.elf
> Found memtest86+ image: /boot/memtest86+.bin
> Found Windows 10 (loader) on /dev/sda1
> Found Windows NT/2000/XP on /dev/sdc1
> error: syntax error.
> error: Incorrect command.
> error: syntax error.
> error: Incorrect command.
> error: syntax error.
> Syntax error at line 568
> Syntax errors are detected in generated GRUB config file.
> Ensure that there are no errors in /etc/default/grub
> and /etc/grub.d/* files or please file a bug report with
> /boot/grub/grub.cfg.new f...

You have script code inside of your submenu "Advanced options for Ubuntu". This is not valid syntax for grub. It's issued by a bad behavior of grub customizer - it shouldn't move script code into submenus.

You can fix it this way:
 - show placeholders (View -> show placeholders)
 - select the entry named "(script code)" inside of the submenu
 - move it out of the submenu

When you save the configuration, you shouldn't get the error message anymore.