From the longer Wikipedia page 
The Szarvas inscription refers to the inscription on a bone needle case found near Szarvas , in southeastern Hungary and dating from the second half of the 8th century, the "Late Avar" period (700-791).
The Hungarian archeologist, historian and linguist Gábor Vékony named the script used on the needle case as "Kárpát-medencei rovásírás" ("Carpathian Basin Rovas script"). He often used this term in his book, A székely írás emlékei, kapcsolatai, története, e.g. in the chapter "A kárpát-medencei rovásábécé korabeli feljegyzése" ("The contemporary record of the Carpathian Basin Rovas alphabet").
Vékony had read the Szarvas transcription as Hungarian, thus proposing it as evidence that the Hungarian-speaking people had appeared in the region by the 7th century. There are several critics of Vékony's theories and translations, most notably the Hungarian linguist and historian, András Róna-Tas. The debates were summarized by István Riba in 1999 and 2000: "many find themselves unable to accept Vékony's theory".
The key point of the critics has been that in traditional Hungarian scholarship, the existence of the Hungarian-speaking population dates from 896 (when the Magyars took over the Carpathian Basin ), while the Szarvas needle case dates from the 8th century. Consequently, either the Szarvas inscription is not in Hungarian or Hungarians were in the Carpathian Basin much earlier than the late 9th century. Róna-Tas attempted to read the Szarvas relic in Turkic instead of Hungarian, but wrote that his transcription needed further improvement. The issue remains an open question amongst Hungarian scholars.