# How to debug - no insert\_text found in new pdf
**URL:** https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201
**Category:** PyMuPDF
**Tags:** text-insertion
**Created:** [November 19, 2025, 3:39pm UTC](https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201 "2025-11-19T15:39:28Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@edzob](https://forum.mupdf.com/u/edzob)
#### Post date: [November 19, 2025, 3:39pm UTC](https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201/1 "2025-11-19T15:39:28Z")
Hi, my goal is to write text to a pdf. When I open the pdf I only see a white page.
I think I have an error in my setup and not in my code. Below a minimal working example.
**Q: How can I debug this, to find out what is going on?**
Thanks, regards Edzo
- Linux fedora 6.17.7-300.fc43.x86\_64 #1 SMP PREEMPT\_DYNAMIC Sun Nov 2 15:30:09 UTC 2025 x86\_64 GNU/Linux
- Python 3.14.0
- pymupdf 1.26.6
**MWE**
```auto
import pymupdf
from pymupdf.utils import getColor
# set defaults
file_name = “PyMuPDF_test.pdf”
text_color = getColor(“black”)
font_size = 32.0
font_name = “spacemo”
p = pymupdf.Point(10, 10)
# debug reasons
text = “Some text.”
# create pdf
newDocument = pymupdf.open()
fmt = pymupdf.paper_rect(“a4”)
newPage = newDocument.new_page(
width = fmt.width, height = fmt.height)
# write to new page
newPage.clean_contents()
newPage.insert_text = ( p,
text,
fontsize := font_size,
fontname := font_name,
color := text_color,
border_width := 1,
overlay := True
)
# write to disk
newDocument.save(file_name,
garbage = 3,
deflate = True,)
newDocument.close()
```
---
### Author:  [@Jamie\_Lemon](https://forum.mupdf.com/u/Jamie_Lemon)
#### Post date: [November 19, 2025, 5:25pm UTC](https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201/2 "2025-11-19T17:25:04Z")
Hi @edzob Welcome to the forum!
looking at your code doesn’t `newPage.insert_text = ( ... `redefine the function?
If I do:
```python
newPage.insert_text( p,
text,
fontsize = font_size,
color = text_color,
border_width = 1,
overlay = True )
```
Then it works okay.
---
### Author:  [@HaraldLieder](https://forum.mupdf.com/u/HaraldLieder)
#### Post date: [November 19, 2025, 8:19pm UTC](https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201/3 "2025-11-19T20:19:20Z")
Additional comments:
Please do not use `page.clean_contents()` here. This is no longer necessary since a many versions.
---
### Author:  [@edzob](https://forum.mupdf.com/u/edzob)
#### Post date: [November 20, 2025, 7:33am UTC](https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201/4 "2025-11-20T07:33:27Z")
Dear @Jamie_Lemon . TY for your advice.
I thought at the start also this was the issue, but with this code I recieve a strange error. I thought I sort of had a new version of test\_insert that needed a different syntax. Apparantly that is not the issue.
I also tried to remove all the spaces and pot it on 1 line, same error.
So I am a bit stuck
@HaraldLieder : Thanks. I removed the line in the code below.
Error
```auto
$ python3 write_pdf.py
File " ****** /write_pdf.py", line 20
fontsize = font_size,
^^^^^^^^^^^^^^^^^^^^^^^^
SyntaxError: invalid syntax. Maybe you meant '==' or ':=' instead of '='?
$
```
With code
```auto
import pymupdf
from pymupdf.utils import getColor
# set defaults
file_name = "PyMuPDF_test.pdf"
text_color = getColor("black")
font_size = 32.0
font_name = "spacemo"
p = pymupdf.Point(10, 10)
# debug reasons
text = "Some text."
# create pdf
newDocument = pymupdf.open()
fmt = pymupdf.paper_rect("a4")
newPage = newDocument.new_page(width = fmt.width,
height = fmt.height)
# write to new page
newPage.insert_text = ( p,
text,
fontsize = font_size,
fontname = font_name,
color = text_color,
border_width = 1,
overlay = True
)
# write to disk
newDocument.save(file_name,
garbage = 3,
deflate = True,)
newDocument.close()
```
---
### Author:  [@Jamie\_Lemon](https://forum.mupdf.com/u/Jamie_Lemon)
#### Post date: [November 20, 2025, 1:30pm UTC](https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201/5 "2025-11-20T13:30:35Z")
> [@edzob](#):
>
> `newPage.insert_text = ( `
I think this should be:
`newPage.insert_text( ...`
---
### Author:  [@Jamie\_Lemon](https://forum.mupdf.com/u/Jamie_Lemon)
#### Post date: [November 20, 2025, 1:31pm UTC](https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201/6 "2025-11-20T13:31:27Z")
@edzob Please also confirm your version of PyMuPDF that you are using!
---
### Author:  [@edzob](https://forum.mupdf.com/u/edzob)
#### Post date: [November 20, 2025, 3:54pm UTC](https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201/7 "2025-11-20T15:54:21Z")
> [@Jamie\_Lemon](#):
>
> version of P
haha .. the = should be the thing. I will test..
my dyslexia hits hard in this one
---
### Author:  [@edzob](https://forum.mupdf.com/u/edzob)
#### Post date: [November 20, 2025, 4:00pm UTC](https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201/8 "2025-11-20T16:00:34Z")
@Jamie_Lemon the wrong calling of the function was the error. **TY so much**.
I had no clue where to find the error and now I know a little bit more.
The version of pymupdf is 1.26.6
the code now is..
```auto
import pymupdf
from pymupdf.utils import getColor
# set defaults
file_name = “PyMuPDF_test.pdf”
text_color = getColor(“black”)
font_size = 32.0
font_name = “spacemo”
p = pymupdf.Point(10, 10)
# debug reasons
text = “Some text.”
# create pdf
newDocument = pymupdf.open()
fmt = pymupdf.paper_rect(“a4”)
newPage = newDocument.new_page(
width = fmt.width,
height = fmt.height
)
# write to new page
newPage.insert_text( p,
text,
fontsize = font_size,
fontname = font_name,
color = text_color,
border_width = 1,
overlay = True
)
# write to disk
newDocument.save(file_name,
garbage = 3,
deflate = True,)
newDocument.close()
```
---
### Author:  [@Jamie\_Lemon](https://forum.mupdf.com/u/Jamie_Lemon)
#### Post date: [November 20, 2025, 10:19pm UTC](https://forum.mupdf.com/t/how-to-debug-no-insert-text-found-in-new-pdf/201/9 "2025-11-20T22:19:00Z")
@edzob No worries! Glad you got it working okay.