Different output from same input and same options

[Thirrrrrrrd]

For example, an input file is:
```
###1. Chaptrer 1
Paragraph 1
Paragraph 2
Paragraph 3
Paragraph 4
```

I use txt input, and set the "Structure" 'markdown' and 'single', and I will get the two different type of output use the same input and same options.

output1:
```html
<h3 id="1-chaptrer-1" class="calibre1">1. Chaptrer 1</h3>
<p class="calibre2">Paragraph 1
Paragraph 2
Paragraph 3
Paragraph 4</p>
```
output2:
```html
<h3 id="1-chaptrer-1" class="calibre1">1. Chaptrer 1</h3>
<p class="calibre2">Paragraph 1</p>
<p class="calibre2">Paragraph 2</p>
<p class="calibre2">Paragraph 3</p>
<p class="calibre2">Paragraph 4</p>
```

What I want is the ouput2, so what happen?

[Kovid Goyal (kovid)]

THere is no randomness in calibre. If you give it the same options and the same input it will produce the same output. Look at the job log for the conversion that will tell you what options are different. You can get the job log by clicking the jobs label in the bottom right corner of the calibre window.