Getting error while converting text to PDF if file starts with alphanumeric text

Product: PDFTron SDK (PDFNet)

Product Version: 6.4.0.29186

Please give a brief summary of your issue:
Getting error while converting text to PDF if file starts with alphanumeric text below is the text file content
abcd123aghjgsdhsbhjsshjbkfsbjf3 2121ndnkjdnnvjvnjvnvjnvjkvn

Please describe your issue and provide steps to reproduce it:
Using method pdftron.PDF.Convert.ToPdf
.txt file with content (abcd123aghjgsdhsbhjsshjbkfsbjf3 2121ndnkjdnnvjvnjvnvjnvjkvn)
getting below exception message
Exception:
Message: An error occurred while converting the file.
Detailed error:
Error converting text content using Text2PDF module.
Conditional expression: false
Filename : Convert.cpp
Function : trn::PDF::Convert::ToPdf
Linenumber : 1694

Please provide a link to a minimal sample where the issue is reproducible:
its just a .txt file with file content
abcd123aghjgsdhsbhjsshjbkfsbjf3 2121ndnkjdnnvjvnjvnvjnvjkvn

Hello, I’m Ron, an automated tech support bot :robot:

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

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Please update to the latest PDFNet SDK, which is now 9.2.

PDFNet 6.4 would be over 6 years ago.

If you still have the issue with 9.2 SDK, then please provide the actual TXT file (since the encoding/binary data is important).