"Matrix is empty!! Error in strsplit(LABEL, "\\. ") : non-character argument

[ajcanepa]

I had followed the tutorial given here.

Following the scopus BibTex code I can get the proper M object.
# Converting the loaded files into a R bibliographic dataframe M <- convert2df(file = myfile, dbsource = "scopus", format = "bibtex")

However, when I run
NetMatrix <- biblioNetwork(M, analysis = "co-citation", network = "references", sep = ";")

I had the following error message:

[1] "Matrix is empty!!"
Error in strsplit(LABEL, "\\. ") : non-character argument

If the M object is OK and gives me all the neccesary information, I have no clue about what can be wrong with the biblioNetwork() function, since I had followed the example by default.

[massimoaria]

Unfortunately, the bibtex format exported by Scopus no longer contains bibliographies. You can verify that the CR (Cited References) column of the M object is empty.

If you want to perform a co-citation analysis, you need to download the Scopus data in CSV format.