Error when applying bycases = FALSE in ampute

[fmartinssp]

I'm trying to run the ampute() function with bycases = FALSE, to the proportion of missingness is defined in terms of cells. I found the following error:

"Proportion of missing cells is too large in combination with the desired number of missing variables"

I'm using the Iris dataset and the command is "missing <- ampute(Iris,mech = "MCAR",bycases = FALSE)".

Could anybody help me?

[fmartinssp]

In addition, I am using the package 'mice' version 3.14.0