Pishrink fails with read only files?

[matalog]

I have been using pishrink for a few days now, as I get my retropie image perfect, the last time I saved it, i have previously made all of the .nes games (maybe others) read only leaving them with 3 r's and no w's.

I didn't think much of that, becasue I could actually still delete the .nes files afterwards, from retropie.

When I then tried to shrink the .img file i made from the sd card, pishrink failed with:

sudo ./pishrink.sh TAPpreret.img
Warning: Unable to open /mnt/hgfs/Pishrink/TAPpreret.img read-write (Permission
denied). /mnt/hgfs/Pishrink/TAPpreret.img has been opened read-only.
Warning: Unable to open /mnt/hgfs/Pishrink/TAPpreret.img read-write (Permission
denied). /mnt/hgfs/Pishrink/TAPpreret.img has been opened read-only.
Warning: Unable to open /mnt/hgfs/Pishrink/TAPpreret.img read-write (Permission
denied). /mnt/hgfs/Pishrink/TAPpreret.img has been opened read-only.
Warning: Unable to open /mnt/hgfs/Pishrink/TAPpreret.img read-write (Permission
denied). /mnt/hgfs/Pishrink/TAPpreret.img has been opened read-only.
mount: /dev/loop0 is write-protected, mounting read-only
Creating new /etc/rc.local
mv: cannot move '/tmp/tmp.mtvGXM0Scj/etc/rc.local' to '/tmp/tmp.mtvGXM0Scj/etc/rc.local.bak': Read-only file system
./pishrink.sh: line 67: /tmp/tmp.mtvGXM0Scj/etc/rc.local: Read-only file system
chmod: changing permissions of '/tmp/tmp.mtvGXM0Scj/etc/rc.local': Read-only file system
e2fsck 1.43.4 (31-Jan-2017)
e2fsck: Operation not permitted while trying to open /dev/loop0
You must have r/w access to the filesystem or be root
resize2fs 1.43.4 (31-Jan-2017)
resize2fs: Operation not permitted while trying to open /dev/loop0
./pishrink.sh: line 84: [[: Couldn'tfindvalidfilesystemsuperblock.: syntax error: invalid arithmetic operator (error token is "'tfindvalidfilesystemsuperblock.")
expr: non-integer argument
expr: non-integer argument
expr: non-integer argument
resize2fs 1.43.4 (31-Jan-2017)
resize2fs: Operation not permitted while trying to open /dev/loop0
Couldn't find valid filesystem superblock.
ERROR: resize2fs failed...
mount: /dev/loop0 is write-protected, mounting read-only
mv: cannot move '/tmp/tmp.mtvGXM0Scj/etc/rc.local.bak' to '/tmp/tmp.mtvGXM0Scj/etc/rc.local': Read-only file system

Does anyone know the workings of pishrink? If it should fail for the possible reason I have given, or could it be something else?

Thanks for any help,

Matalog.

[matalog]

I have no idea why it chose to become read only, but the fact that it was, was the problem.

I endedup having to copy the image using a ubuntu VM and then unclicking 'readonly' in properties in windows (didn't show like that on the original) and then I could finally sudo chmod -R 777 TAPpreret2.img to make it not read only, and now pi shrink works on it.