An IndexError with generating the mutational matrix

[Xinwen1206]

I got this error when I run this function in R. Do you know why it comes from and how I can address it?

Running SigProfilerMatrixGeneratorR... Starting matrix generation for SNVs and DINUCs... Error in py_call_impl(callable, call_args$unnamed, call_args$named) : IndexError: index out of range

It seems come from this code: catalogue_generator_single at MutationMatrixGenerator.py#451 for l in range(start1 + 1, start2, 1): if l - 1 < len(chrom_string):

Thanks!