面对Rstudio环境中的rmarkdown问题。
报告了以下错误：
This is pdfTeX, Version 3.14159265-2.6-1.40.16 (MiKTeX 2.9)
log4cxx: No appender could be found for logger (pdflatex).
log4cxx: Please initialize the log4cxx system properly.
Sorry, but pdflatex did not succeed.
You may want to visit the MiKTeX project page (http://miktex.org), if you
需要帮助。
我看到其他人报告了同样的问题，但没有找到解决方法。
MikTex 2.9.5721 x64
pandoc 1.15.0.6
sessionInfo（）
R version 3.1.2 (2014-10-31)
Platform: x86_64-w64-mingw32/x64 (64-bit)
locale:
[1] C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] devtools_1.8.0
loaded via a namespace (and not attached):
[1] R6_2.1.1 Rcpp_0.12.0 curl_0.9.3 digest_0.6.8 git2r_0.11.0 htmltools_0.2.6 httr_1.0.0 magrittr_1.5
[9] memoise_0.2.1 rmarkdown_0.8 rversions_1.0.2 stringi_0.5-5 stringr_1.0.0 tools_3.1.2 xml2_0.1.1 yaml_2.1.13