Someone else reported this too, it looks like a new bug I introduced in 0.10.4

Can you try saving again and see if you get the same error?

i was trying many times, still get the same error.

You need to exit GooTool and restart it, then wait a moment before saving. I'm making another release now with this bug fixed.

See forum title "Gootool Bug" for the temporary solution while David Croft rejigs Gootool.

Im getting the same message when i try to save but mine says "Ioexception in spider goo balls: (access is denied)(com.goofans.gootool.N)

Can you paste the last section of the log file?

Yea its "C:\Program Files\WorldOfGoo\NewFolder\res\balls\Ivy\Thumbs.db"

Did you upgrade to 0.10.5? I thought this bug was fixed in 0.10.5. Come to think of it, maybe the Thumbs.db file is in the mod itself!

Yea i upgrade maybe it is the mod because i tried uninstalling it and re-downloading and installing.

I had to take Thumbs.db out of my addin to get it to work, it was that same thing, so it is the addin.

How do u take out the thumbs.db?

change .goomod to .zip , delete the thumbs.db (wherever it is) and rename it back to .goomod, then install the mod again.

Alrite! Thanx! I got it to work now!