`no lines available in input error` while running example code

Hi!

I recently found out about your paper and very excited try your package on an ongoing project!

I was following your tutorial code and got an error.

I downloaded your master-16f2fed6ff3351cf6fcf9c1accd79fba13c5445b branch and installed to R from the source. I was able load the VarExp library, and GWAS and COHORT data sets without any problems. However, I am getting an error when running getGenoCorMatrix function. Please see my code below:

> # Load the package
> library(VarExp)
> # Load the meta-analysis summary statistics file
> data(GWAS)
> head(GWAS)
           RSID CHR     POS A0 FREQ_A0  MAIN_EFFECT  INT_EFFECT
430  rs72900467   1  989500  A 0.05558 -0.282895628  0.11487230
1085 rs34372380   1 1305201  T 0.11205 -0.003162676  0.01704444
134   rs4422949   1  834928  G 0.21753 -0.133573045 -0.11129018
469   rs9442366   1 1009234  T 0.42201  0.121852094 -0.09421119
50   rs61768199   1  781845  G 0.09736 -0.017142010  0.02977832
1318  rs9439462   1 1462766  T 0.04784  0.206595425  0.06823945
> # Load the cohort description file
> data(COHORT)
> head(COHORT)
  Cohort PHENO_N PHENO_Mean PHENO_SD EXPO_Mean  EXPO_SD
1      1   10000   1.297265 3.097524  2.002715 1.250979
2      2   10000   1.288332 3.152367  2.009427 1.242574
3      3   10000   1.390218 3.109720  1.995473 1.258670
4      4   10000   1.342020 3.151429  1.999943 1.256718
5      5   10000   1.385564 3.153274  2.002401 1.235129
> # Compute the genotype correlation matrix from the reference panel
> C <- getGenoCorMatrix(GWAS$RSID, GWAS$CHR, GWAS$POS, GWAS$A0, "EUR", pruning = FALSE)
 Error in read.table(file = file, header = header, sep = sep, quote = quote,  : 
  no lines available in input 

Am I missing something here?