The Puzzle of Proto-Elamite (2013)
historytoday.com
historytoday.com
> Early attempts at decipherment were also confounded by numerical errors and the sloppy writing of the original tablets
As you would expect. Imagine writing receipt slips by hand.
> Jacob Dahl believes that some of the signs are being used to indicate syllables, making these the first texts in the world to use a syllabary.
Well "some" here means "not many". Probably names.
The reason that decipherment of Proto-Elamite stalled is not for lack of material. It's because accounting is boring. That's not to say I wouldn't want to participate :-)
"Do you not recall the (fate of) the unskilled man? His name is not known... Be a scribe, and be spared from soldiering! You call and one says: "Here I am." You are safe from torments. Every man seeks to raise himself up. Take note of it!"
http://www.u.arizona.edu/~afutrell/w%20civ%2002/paplansing.h...
This book came out that republishes incomplete research that establishes cognates and place name parallels, although no grammatical connections made. In light of the progress made in the IVC script, it seems compelling. https://tamilnet.com/art.html?catid=79&artid=38813
In the meantime since this article was published in 2013, for IVC in terms of a Dravidian language, there's been a lot of progress in terms of script decipherment (to the point where the theory has become proof), archaeology, and DNA analysis that support each other consistently.