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I am trying to publish my first R package. I run the R CMD CHECK command and managed to clear all warnings and notes except the one saying:

LaTeX errors when creating PDF version. This typically indicates Rd problems.

I checked the LaTex log file but I can't make any sense of any of the information in there. Can anyone point me in the right direction? Here is the file:

LaTeX Font Warning: Some font shapes were not available, defaults substituted.

   
LaTeX Font Warning: Font shape `OML/cmtt/m/n' undefined
(Font)              using `OML/cmm/m/it' instead
(Font)              for symbol `textless' on input line 20.

 
LaTeX Font Warning: Some font shapes were not available, defaults substituted.

 
1/public/amsfonts/cm/cmtt10.pfb>
Output written on Rd2.pdf (4 pages, 117453 bytes).
Transcript written on Rd2.log.
Saving output to '<package-manual>.pdf' ...
Done
Faustin Gashakamba
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    The latex log does not look too bad, a couple of warnings, but I can't find any error message. – samcarter_is_at_topanswers.xyz Sep 16 '21 at 20:59
  • @samcarter_is_at_topanswers.xyz yes it's actually one warning only. Nonetheless, I can't submit my package to CRAN unless I find a way to silence that. The warning is question is: `Font shape OML/cmtt/m/n' undefined; using OML/cmm/m/it instead`. I believe you can help me with that? – Faustin Gashakamba Sep 18 '21 at 08:32
  • without seeing a [mre] to reproduce the warning, the most we can say is: use a font which has the shapes you use. – samcarter_is_at_topanswers.xyz Sep 19 '21 at 10:23
  • .... but I highly doubt solving the warning will solve the problem. Why would any sane program interpret the warning as error? There must be something else going on – samcarter_is_at_topanswers.xyz Sep 19 '21 at 10:24
  • The checking of submitted R packages on CRAN is an automated process. If the process triggers any warning or even "notes", then the application won't go through. In my case, the PDF documentation is generated and if it wasn't for this warning, then everything could have been fine. – Faustin Gashakamba Sep 20 '21 at 14:13

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