Errors on HTML export

Hello!
A project I've been working on for a while has started generating a new error when trying to export.
Does this text make sense to anyone?

Traceback (most recent call last):
File "C:\blend4web_ce_lite\addons\blend4web\html_exporter.py", line 105, in execute
self.run(filepath_val)
File "C:\blend4web_ce_lite\addons\blend4web\html_exporter.py", line 168, in run
data = json.dumps(extract_data(json_path, json_name, self.export_converted_media))
File "C:\blend4web_ce_lite\addons\blend4web\html_exporter.py", line 226, in extract_data
data[relpath] = encode_binary_sequence(exporter.get_binaries_data())
File "C:\blend4web_ce_lite\addons\blend4web\html_exporter.py", line 323, in encode_binary_sequence
return str(base64.b64encode(bin_seq))[2:-1]
File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\base64.py", line 62, in b64encode
encoded = binascii.b2a_base64(s)[:-1]
MemoryError

location: <unknown location>:-1

It looks like there's a problem with the exporter, but it works for other files I have tried.
Thanks for any help.

Hi and welcome to the forum!

Thanks for the report. Attaching a project where this problem is reproduced would significantly help us. From the back-trace it looks like something really big is being processed during the export process.

Thanks for the response.

It is a big file. Lots of baked vertex animation…
I'll attach this time.

Having trouble attaching this 47mb zip file.

Could you pull it from a dropbox link?

https://www.dropbox.com/s/cxrchtfpkox6c22/differential_OUT_03.zip?dl=0