I tried to run the FRASER package on a public dataset GSE119954 with an identified splice site variation as a pilot study before using my data. I used a sample table with the requirement that you mentioned in the paper on bioconductor, with just RPS26 as target gene, and ran the package. But in the results, there are different areas rather than chr12 that the target gene located, also there are 4 sites in chr12 but not in RPS26 locus.