Hi Sergio,
I think if you want to paste a value from the clipboard (not copied from another Excel Worksheet) you won't be able to use the ""Excel VBO Paste"" action, you'll probably have to use ""Utility - Environment / Get Clipboard"" to save you clipboard in a variable and then the ""Excel VBO Set Cell Value"" to the cell reference (your input ""value"" is your clipboard variable).
If you try to copy / paste an excel cells selection from a worksheet to another and the ""paste"" action is not working it's probably because you have an action that cancel your ""copy""
Cheers