invalid class “itemMatrix” object: item labels not unique

[kliegr]

It looks like that the frameToRules function sometimes returns error "invalid class “itemMatrix” object: item labels not unique"
Some debugging showed that

unique(unlist(sapply(rowItems, function(x) x$ant)))

does not filter out repeating items.
A fix seems to be replacing this with

unique(c(unlist(sapply(rowItems, function(x) x$ant))))

That is

antItems <- unique(c(unlist(sapply(rowItems, function(x) x$ant))))
consItems <- unique(c(unlist(sapply(rowItems, function(x) x$cons))))

[HanselPalencia]

Where are we on this fix? I am currently getting this error, and would benefit from a solution. I tried taking the source code of the function and replacing the section that you talked about it in your post, but it did not work.

I also attempted,

unique(mydatset) 

to see if all rows were unique and they were.

Any insight?