I'm struggling with toolboxes that I got from my teacher in a folder as you can see on the pictures. Sorry about the swedish there, I have toolbox folder with two items in it that i'm trying to use. It seems fine with everything in the assembly until I close it and try to open it again. Everytime I do that, I get error with the toolbox items missing. I have another picture that shows the folder opened with the two items. I know there is a big toolbox folder inside solidworks already, but my teacher wanted me to use this one. How can I fix this problem with customized toolbox folder for this assembly?