Hello,

I'm trying to use the myvariant package but I'm getting a parsing error. Here's an example:

library(VariantAnnotation)
library(myvariant)

file.path <- system.file("extdata", "dbsnp_mini.vcf", package="myvariant")
vcf <- readVcf(file.path, genome="hg19")
hgvs <- formatHgvs(vcf, variant_type="snp")
variant <- getVariants(hgvs)
Concatenating data, please be patient.
Error: parse error: trailing garbage
          Error transforming results" }{   "responses": [     {       
                     (right here) ------^

traceback()
13: .Call(R_parse, txt, bigint_as_char)
12: parse_string(txt, bigint_as_char)
11: parseJSON(txt, bigint_as_char)
10: fromJSON_string(txt = txt, simplifyVector = simplifyVector, simplifyDataFrame = simplifyDataFrame, 
        simplifyMatrix = simplifyMatrix, flatten = flatten, ...)
9: FUN(X[[i]], ...)
8: lapply(x, fromJSON, flatten = TRUE)
7: lapply(x, fromJSON, flatten = TRUE)
6: .json2df(gene_obj)
5: .return.as(res, return.as = return.as)
4: getVariants(hgvsids, fields, verbose, ..., return.as = return.as, 
       myvariant = myvariant)
3: getVariants(hgvsids, fields, verbose, ..., return.as = return.as, 
       myvariant = myvariant)
2: getVariants(hgvs)
1: getVariants(hgvs)

Here's my sessionInfo():

sessionInfo()
R version 3.3.2 (2016-10-31)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X Yosemite 10.10.5

locale:
[1] en_AU.UTF-8/en_AU.UTF-8/en_AU.UTF-8/C/en_AU.UTF-8/en_AU.UTF-8

attached base packages:
[1] stats4    parallel  stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
 [1] myvariant_1.4.0            VariantAnnotation_1.20.2   Rsamtools_1.26.1           Biostrings_2.42.1         
 [5] XVector_0.14.0             SummarizedExperiment_1.4.0 Biobase_2.34.0             GenomicRanges_1.26.2      
 [9] GenomeInfoDb_1.10.2        IRanges_2.8.1              S4Vectors_0.12.1           BiocGenerics_0.20.0       

loaded via a namespace (and not attached):
 [1] splines_3.3.2            lattice_0.20-34          colorspace_1.3-2         htmltools_0.3.5         
 [5] rtracklayer_1.34.1       GenomicFeatures_1.26.2   base64enc_0.1-3          survival_2.40-1         
 [9] XML_3.98-1.5             foreign_0.8-67           DBI_0.5-1                BiocParallel_1.8.1      
[13] RColorBrewer_1.1-2       plyr_1.8.4               stringr_1.1.0            zlibbioc_1.20.0         
[17] munsell_0.4.3            gtable_0.2.0             htmlwidgets_0.8          memoise_1.0.0           
[21] knitr_1.15.1             latticeExtra_0.6-28      biomaRt_2.30.0           curl_2.3                
[25] AnnotationDbi_1.36.2     htmlTable_1.9            Rcpp_0.12.9              acepack_1.4.1           
[29] scales_0.4.1             backports_1.0.5          BSgenome_1.42.0          checkmate_1.8.2         
[33] Hmisc_4.0-2              jsonlite_1.2             gridExtra_2.2.1          ggplot2_2.2.1           
[37] digest_0.6.12            stringi_1.1.2            grid_3.3.2               tools_3.3.2             
[41] bitops_1.0-6             magrittr_1.5             RCurl_1.95-4.8           lazyeval_0.2.0          
[45] RSQLite_1.1-2            tibble_1.2               Formula_1.2-1            cluster_2.0.5           
[49] Matrix_1.2-8             data.table_1.10.0        assertthat_0.1           httr_1.2.1              
[53] R6_2.2.0                 rpart_4.1-10             GenomicAlignments_1.10.0 nnet_7.3-12 

Best,

Dave

Hi Dave,

Thanks for the message pointing this out.  This error was caused by a recent server update changing the parsing of the "fields" parameter.  When the R client passed a NULL "fields", it caused an error.  I fixed this on the servers and verified that your example completes correctly, as shown below:

> library(myvariant)
> file.path <- system.file("extdata", "dbsnp_mini.vcf", package="myvariant")
> vcf <- readVcf(file.path, genome="hg19")
> hgvs <- formatHgvs(vcf, variant_type="snp")
> variant <- getVariants(hgvs)
Concatenating data, please be patient.
> length(variant)
[1] 225
> 

Let me know if you have any other issues.

Cyrus