Cannot convert or Print EPUB to PDF

[NightShot]

Hi all - this is my first post. I am having a problem converting an EPUB book (it's a large 91MB file) to PDF. I have also tried printing it to PDF with no success. Either way the error dump looks almost identical. It goes through the motions of conversion successfully, then Python shuts down with the message "PoDoFo is out of memory". Is this a file size vs RAM issue (I have 8GB on my XPS 13 9360). Here's the tail end of the error log-any help appreciated!!

Python function terminated unexpectedly
PoDoFo is out of memory.
File: C:\t\t\podofo-85g0_j9q\src\base\PdfWriter.cpp Line: 211
File: C:\t\t\podofo-85g0_j9q\src\base\PdfRefCountedBuffer.cpp Line: 130 PdfRefCountedBuffer::Resize failed!
(Error Code: 1)
Traceback (most recent call last):
File "site.py", line 114, in main
File "site.py", line 88, in run_entry_point
File "site-packages\calibre\utils\ipc\worker.py", line 209, in main
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 43, in gui_convert_override
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 28, in gui_convert
File "site-packages\calibre\ebooks\conversion\plumber.py", line 1275, in run
File "site-packages\calibre\ebooks\conversion\plugins\pdf_out put.py", line 188, in convert
File "site-packages\calibre\ebooks\conversion\plugins\pdf_out put.py", line 255, in convert_text
File "site-packages\calibre\ebooks\pdf\html_writer.py", line 1320, in convert
Error: PoDoFo is out of memory.
File: C:\t\t\podofo-85g0_j9q\src\base\PdfWriter.cpp Line: 211
File: C:\t\t\podofo-85g0_j9q\src\base\PdfRefCountedBuffer.cpp Line: 130 PdfRefCountedBuffer::Resize failed!

[kovidgoyal]

Install the 64bit version of calibre.

[NightShot]

Brilliant! Thank you! Worked perfectly.