r - TikzDevice: 'cannot create lock file' error when using grid.arrange -

i use tikz plotting device document. compile *.rnw file rstudio , error message set

dev='tikz' 

the error

the error message that

error in createlockfile(lockname): cannot create lock file 

this error documented in conjunction other issues (e.g. see here https://github.com/sharpie/rtikzdevice/issues/66), found issue here unrelated documented elsewhere.

a reproducible example:

please find below reproducible example:

\documentclass{scrartcl}  \usepackage{color,graphicx} \usepackage{tikz}  <<setup, message=false, cache=false, echo=false>>= #set chunk options here opts_chunk$set(fig.path='figure/graphics-', cache.path='cache/graphics-', fig.align='center', fig.width=13.69, fig.height=6.27, dev='tikz', fig.keep='last', cache=true, par=true, echo=false, message=false,     warning=false, results= 'hide') # load ggplot library(ggplot2) @  \begin{document}  \begin{figure}[h] <<plot>>= data <- data.frame(some.data = rnorm(10)) p1 <- ggplot(data, aes(x=1:10, y=some.data)) +  geom_point() + ylab(expression(x[t])) p2 <- ggplot(data, aes(x=1:10, y=some.data)) +  geom_line() + ylab(expression(x[t])) library(gridextra) grid.arrange(p1, p2, ncol=1) @ \end{figure}  \end{document}     

and session info

r version 3.0.2 (2013-09-25) platform: x86_64-w64-mingw32/x64 (64-bit)  attached base packages: [1] stats     graphics  grdevices utils     datasets  methods   base       other attached packages: [1] tikzdevice_0.7.0 filehash_2.2-2    loaded via namespace (and not attached): [1] grid_3.0.2  tools_3.0.2 

together rstudio version 0.98.501

the problem

the problem seems occur when want arrange ggplots p1 , p2 using package gridextra. i.e. when plot graphs individually without arranging them code works, seems not able handle grid.arrange command. there way arrange plots such tikz works?

many thanks!