Error in DMetaData(corpus) : could not find function "DMetaData"

[amacanovic]

Hello all,

I've seen this issue appearing in 2015 and it appeared to have been solved by updating to the newest version. Still, I am facing it now, trying to run tm.plugin.sentiment's score function on my feedback_corpus corpus file:

feedback_corpus <- Corpus(VectorSource(Feedback_eng$comment))
tm_tag_score <- tm_term_score
corpus <- score(feedback_corpus)

Throws the following:
Error in DMetaData(corpus) : could not find function "DMetaData"

I have updated via devtools and still see this happening.
Any ideas?

Thanks!