Running examples in ‘biomartr-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: getFilters
> ### Title: Retrieve All Available Filters for a Specific Dataset
> ### Aliases: getFilters
> 
> ### ** Examples
> 
> # search for available datasets
> getMarts()
# A tibble: 15 x 2
   mart                  version                       
   <chr>                 <chr>                         
 1 ENSEMBL_MART_ENSEMBL  Ensembl Genes 92              
 2 ENSEMBL_MART_MOUSE    Mouse strains 92              
 3 ENSEMBL_MART_SEQUENCE Sequence                      
 4 ENSEMBL_MART_ONTOLOGY Ontology                      
 5 ENSEMBL_MART_GENOMIC  Genomic features 92           
 6 ENSEMBL_MART_SNP      Ensembl Variation 92          
 7 ENSEMBL_MART_FUNCGEN  Ensembl Regulation 92         
 8 plants_mart           Ensembl Plants Genes 39       
 9 plants_variations     Ensembl Plants Variations 39  
10 fungi_mart            Ensembl Fungi Genes 39        
11 fungi_variations      Ensembl Fungi Variations 39   
12 protists_mart         Ensembl Protists Genes 39     
13 protists_variations   Ensembl Protists Variations 39
14 metazoa_mart          Ensembl Metazoa Genes 39      
15 metazoa_variations    Ensembl Metazoa Variations 39 
> # choose database (mart): "ENSEMBL_MART_ENSEMBL"
> head(getDatasets(mart = "ENSEMBL_MART_ENSEMBL"), 10)
# A tibble: 10 x 3
   dataset                  description                          version       
   <chr>                    <chr>                                <chr>         
 1 mcaroli_gene_ensembl     Ryukyu mouse genes (CAROLI_EIJ_v1.1) CAROLI_EIJ_v1…
 2 rnorvegicus_gene_ensembl Rat genes (Rnor_6.0)                 Rnor_6.0      
 3 hsapiens_gene_ensembl    Human genes (GRCh38.p12)             GRCh38.p12    
 4 mmurinus_gene_ensembl    Mouse Lemur genes (Mmur_3.0)         Mmur_3.0      
 5 ppaniscus_gene_ensembl   Bonobo genes (panpan1.1)             panpan1.1     
 6 csavignyi_gene_ensembl   C.savignyi genes (CSAV 2.0)          CSAV 2.0      
 7 pvampyrus_gene_ensembl   Megabat genes (pteVam1)              pteVam1       
 8 ocuniculus_gene_ensembl  Rabbit genes (OryCun2.0)             OryCun2.0     
 9 loculatus_gene_ensembl   Spotted gar genes (LepOcu1)          LepOcu1       
10 vpacos_gene_ensembl      Alpaca genes (vicPac1)               vicPac1       
> # choose dataset: "hsapiens_gene_ensembl"
> head(getFilters(mart = "ENSEMBL_MART_ENSEMBL", 
+                 dataset = "hsapiens_gene_ensembl") , 5)
Error in curl::curl_fetch_memory(url, handle = handle) : 
  transfer closed with outstanding read data remaining
Calls: head ... request_fetch -> request_fetch.write_memory -> <Anonymous>
Execution halted