Hello,

a user of the CAGEr package reported an error that occurs when it calls the `export.bw` function of rtracklayer:

rsession: 1730343 1730344 doesn't intersect 1892288 1899678, chromId 6 chromSize 5022195: Resource temporarily unavailable
Error in isSingleString(path) : UCSC library operation failed
In addition: Warning message:
In isSingleString(path) : Internal error ucsc/bbiWrite.c 414

This is triggered by a GRanges object that has 236595 lines and 13304 seqlevels. My attempts to bisect the object to find a defective line did not succeed; but it seems important that I keep most of the contents to trigger the error. I therefore wonder if the problem is either the number of lines or the number of seqlevels.

Not being very familiar with the BigWig format and the internals of rtracklayer, I am a bit lost.

Can somebody suggest me a way to solve the problem ?

Have a nice day,

Charles

R version 4.0.2 (2020-06-22)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Debian GNU/Linux bullseye/sid

Matrix products: default
BLAS:   /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.9.0
LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.9.0

locale:
[1] LC_CTYPE=en_GB.UTF-8 LC_NUMERIC=C LC_TIME=en_GB.UTF-8 [4] LC_COLLATE=en_GB.UTF-8 LC_MONETARY=en_GB.UTF-8 LC_MESSAGES=en_GB.UTF-8 [7] LC_PAPER=en_GB.UTF-8 LC_NAME=C LC_ADDRESS=C [10] LC_TELEPHONE=C LC_MEASUREMENT=en_GB.UTF-8 LC_IDENTIFICATION=C

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

other attached packages:
 [1] CAGEr_1.31.3                MultiAssayExperiment_1.15.2
 [3] SummarizedExperiment_1.19.5 DelayedArray_0.15.6
 [5] matrixStats_0.56.0          Matrix_1.2-18
 [7] Biobase_2.49.0              GenomicRanges_1.41.5
 [9] GenomeInfoDb_1.25.8         IRanges_2.23.10
[11] S4Vectors_0.27.12           BiocGenerics_0.35.4

loaded via a namespace (and not attached):
[1] Rcpp_1.0.5 stringdist_0.9.5.5 lattice_0.20-41 [4] formula.tools_1.7.1 Rsamtools_2.5.3 Biostrings_2.57.2 [7] gtools_3.8.2 digest_0.6.25 R6_2.4.1 [10] plyr_1.8.6 ggplot2_3.3.2 pillar_1.4.5 [13] zlibbioc_1.35.0 rlang_0.4.7 rstudioapi_0.11 [16] data.table_1.12.8 vegan_2.5-6 splines_4.0.2 [19] BiocParallel_1.23.2 RCurl_1.98-1.2 munsell_0.5.0 [22] compiler_4.0.2 rtracklayer_1.49.3 pkgconfig_2.0.3 [25] mgcv_1.8-31 tidyselect_1.1.0 tibble_3.0.2 [28] GenomeInfoDbData_1.2.3 XML_3.99-0.4 reshape_0.8.8 [31] permute_0.9-5 crayon_1.3.4 dplyr_1.0.0 [34] GenomicAlignments_1.25.3 MASS_7.3-51.6 bitops_1.0-6 [37] grid_4.0.2 nlme_3.1-148 gtable_0.3.0 [40] lifecycle_0.2.0 magrittr_1.5 scales_1.1.1 [43] KernSmooth_2.23-17 stringi_1.4.6 som_0.3-5.1 [46] XVector_0.29.3 ellipsis_0.3.1 generics_0.0.2 [49] vctrs_0.3.1 tools_4.0.2 BSgenome_1.57.4 [52] glue_1.4.1 purrr_0.3.4 colorspace_1.4-1 [55] cluster_2.1.0 operator.tools_1.6.3 beanplot_1.2
[58] memoise_1.1.0            VGAM_1.1-3

--
Charles Plessy - - ~ ~ ~ ~ ~ ~~~~ ~ ~ ~ ~ ~ - - charles.ple...@oist.jp
Okinawa  Institute  of  Science  and  Technology  Graduate  University
Staff scientist in the Luscombe Unit - ~ - https://groups.oist.jp/grsu
Toots from work - ~ ~~ ~ - https://mastodon.technology/@charles_plessy

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