Error message: PDF Error: Unexpected MC Type: 7

[ciaract]

Hey,
i am using the function "image_read_pdf()" for a list of pdf-files. Unfortunately I am getting the following error-message in some cases:
[1] 5 [1] "Read file: /Volumes/Elements/XXXXX.pdf" PDF error (2077870): Unexpected MC Type: 7 PDF error (2143467): Unexpected MC Type: 7 PDF error (2150013): Unexpected MC Type: 7 PDF error (2163240): Unexpected MC Type: 7 PDF error (2168714): Unexpected MC Type: 7 PDF error (2174832): Unexpected MC Type: 7 PDF error (2181652): Unexpected MC Type: 7 PDF error (2187615): Unexpected MC Type: 7

I couldn`t find a documentation about this message anywhere. Can you give me some further information?

Thanks for your amazing work, I am a big fan of magick! :)

[ciaract]

The code from the console is not transferred in the correct formatting. Here is another screenshot

[jeroen]

Can you share an example document and your sessionInfo() so we can try to test it?
Also sometimes the pdf errors are ignorable and the output still works...

[ciaract]

Sorry for answering so late. Unfortunately I am not allowed to share the documents. Bu I can share my session info with you:

`> sessionInfo()
R version 4.4.0 (2024-04-24)
Platform: aarch64-apple-darwin20
Running under: macOS Sonoma 14.4.1

Matrix products: default
BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/4.4-arm64/Resources/lib/libRlapack.dylib; LAPACK version 3.12.0

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/de_DE.UTF-8/en_US.UTF-8

time zone: Europe/Berlin
tzcode source: internal

attached base packages:
[1] stats graphics grDevices utils datasets methods base

other attached packages:
[1] dplyr_1.1.4 magick_2.8.3 tesseract_5.2.1 needs_0.0.3

loaded via a namespace (and not attached):
[1] digest_0.6.35 R6_2.5.1 utf8_1.2.4 qpdf_1.3.3 tidyselect_1.2.1 magrittr_2.0.3 rappdirs_0.3.3 glue_1.7.0
[9] tibble_3.2.1 pkgconfig_2.0.3 generics_0.1.3 lifecycle_1.0.4 cli_3.6.2 askpass_1.2.0 fansi_1.0.6 vctrs_0.6.5
[17] withr_3.0.0 compiler_4.4.0 tools_4.4.0 pillar_1.9.0 Rcpp_1.0.12 pdftools_3.4.0 rlang_1.1.3 `

[jeroen]

I can't really help, there seems to be something in the pdf that pdftools does not like. But are you sure the warnings are not ignorable? Sometimes magick prints some errors to the screen but those don't affect the result.

[ciaract]

I will check! However: Thanks for your help!