Click Add To, and the dialog should come up. Unless you broke your MMItems.txt, in which case you should try the one I posted.

I downloaded the unitec mmtext before, put it into the base.rte directory. I start up the mod manager, go to any of the vanilla wave thingies, and do add to, then it gives me ERROR, value cannot be null. parameter name: source.

There's your problem. Put the MMItems inside of your mod's folder, in this case, Unitec.

I did that, and it still comes up with the error when I try "Add to"

I do it on drop ship MK1, if that means anything.

File
>Settings
>Enable enhanced skirmish

OHderp. I should have caught that.

yet again, I enable enhanced skirmish and it still gives me the Error

it is also not a windows error, the actual manager gives me it.

again, it is

Error message :

Value cannot be null.

Parameter name: source.

probably is no use to you, but just making sure.

Try the latest version. It doesn't require MMItems.

I am using CCMM 2.0, isn't that the latest?

It is. The MMItems thing is for an older version.

In that case either talk to SneakyMax or download the previous version that does require MMItems.

So, why is the mod manager giving me that error?

eh, whatever. I hope 1.6 works.

That error has been found on at least 2 other systems, and the cause is yet unknown.

It's in the thread.

It could be getting permissions issues if your CC is in C:\Program Files, move it to your desktop.

It isn't

We already went through that bit.