无法打开文件“"，原因是没有这样的文件或目录
我遇到了以下问题，在Rserve中的R中运行代码时，有时会发生 .到目前为止，我无法复制它.
I've run into the following problem, which sometimes happens when running the code in R under Rserve. So far I was unable to replicate this.
我首先使用
pdf(file=paste(output.dir, "/dates_",name,".pdf",sep=""),width=6.25,height=9,title="Breakdown Dates:")
然后绘制数据:
plot(time, data1, xlab="", ylab="")
大多数情况下，当它失败时，我会收到错误消息:
Most of the time it works, when it fails I get the error:
无法打开文件"，原因是没有这样的文件或目录
cannot open file '', reason No such file or directory
我已经重新运行了这个程序，并调试了多次，一切正常.但是，有时在生产中会失败.目前，我怀疑是RServe还是文件系统.
I've rerun this and debugged multiple times and all is working fine. However, sometimes in production it fails. Currently I suspect either the RServe or the file system perhaps.
任何想法都将受到欢迎.
Any ideas would be welcome.
file.path在文件系统中的可移植性要比paste大，因为它会自动设置适当的目录分隔符.仅将paste(或paste0)用作文件名:
file.path is more portable across file systems than paste, as it automatically sets appropriate directory separators. Use paste (or paste0) for just the filename:
pdf(file=file.path(output.dir, paste0("dates_", name, ".pdf")),
width=6.25,height=9,title="Breakdown Dates:")