I've got a bunch of similar items that have color and size options. I'm able to add some to my cart but, on others, I get this:

"The following items have been added to your order.
The following product isn't currently available in our store: LW91MRed"

I have Stock Management turned off but I suspect it has to do with options. Anything I have that only has size as an option works fine but anything that has both size AND color options does not work. Also, the colors in the drop down menu are showing as red. What am I missing here?

I guess the bigger question here is, can I do this without stock management? These items are made to order so there's no need to use it. Or, is my only option to use it and set stock levels very high in which case, can I hide the stock? Looking at the instructions and using alt IDs, I will need to create 100s if not 1000s of products having 4-8 colors each as well as 8-10 sizes each. Is this my only option?

I have solved this. It was an issue with the Alt ID.