Rmarkdown - 错误：pandoc文档转换失败，错误43

Question

在进入细节之前，我已经搜索了几个具有相似标题的主题，并尝试了建议的答案，但我无法解决，所以新线程。

所以我将项目详细信息放在文件*.Rmd中。我正在尝试使用rmarkdown创建一个PDF文件。但它显示以下错误

pandoc: Error producing PDF Error: pandoc document conversion failed with error 43

我试图创建PDF的是

library("rmarkdown") render("file.Rmd", "pdf_document")

但是它正在正确创建html文件。任何帮助将不胜感激。

顺便说一下，我使用的是ubuntu 14.04，而不是Rstudio。

来自test.Rmd

的示例内容

<!-- Documentation for Microarray data analysis project-->

## **Microarray Data Analysis Project**

### Establishing Gene Expression profiles of CAFs in (GBOC) cell lines

******

***Cancer Associated Fibroblasts***, like normal fibroblasts secrete growth factors for the development but
for the development of tumors. Adding to the complexity of understanding the role of CAFs, there is a lot of
inter-tumor heterogeneity in the expression of CAFs among different tumors of a same cancer type. 

#### qPCR results for a-SMA IMAGE

* Two groups - qPCR experiment.

group-1             | group-2
:-------------------------: |:------------------------:
    KV01-H          |   KV02-L
    KV08-H          |   KV05-L
    KV09-H          |   KV07-L
    KV010-H         |   AP010-L
    AP018-H         |   AP016-L
    AP024-H         |   AP020-L

To further understand the effect differential expression of CAF on other genes expression in 2 groups, a microarray.

谢谢。