Trouble with Adding Custom Formats

[Roger R]

I'm trying to add a custom format and I get the message
that "no more custom number formats can be added." Is
there something that I need to do to unlock this option?

 

[Max]

Check out these 2 previous posts by MVP Leo Heuser,
where he provides 2 VBA subs to deal with it

Sub DeleteUnusedStyles()
http://tinyurl.com/mmrd

Sub DeleteUnusedCustomNumberFormats()
[ version 1.01 ]
http://tinyurl.com/37vz7