Can't convert docx to pdf

I swear this process worked within the past three weeks.

Converter.Convert(@"C:\IDEM\myfile.docx", @"C:\IDEM\myfile.pdf");

Returns:

Exception: Read Error: Probable I/O race condition detected while copying memory. The I/O package is not thread safe by default. In multithreaded applications, a stream must be accessed in a thread-safe way, such as a thread-safe wrapper returned by TextReader's or TextWriter's Synchronized methods. This also applies to classes like StreamWriter and StreamReader.

Converter.Convert(@"C:\IDEM\Book1.xlsx", @"C:\IDEM\TheFile.pdf");
Causes no error, generates no file.

Converter.Convert(@"C:\IDEM\text.txt", @"C:\IDEM\TheFile.pdf");
Generates the PDF just fine.

I am doing this in .NET 4, I am a paid customer, I have the ceTeLicenseKeys.csl3 file in place and a key for DynamicPDF Converter v3.0 for .NET Server License. Again, this has worked before, can anyone assist?

Hello,

This is a known issue, and our developers are working on a fix. We will post an update on the forum once a new build of DynamicPDF Converter including a fix is ready for download.

Thanks,
ceTe Software Support Team

Thank you,

I uninstalled everything else and reinstalled to get it to work for now.

Thanks for your response.