[Mister L]

Originally Posted by jhowell

It is a known problem with running EpubCheck under 32-bit java.

https://github.com/w3c/epubcheck/wik...roubleshooting

Thank you very much. The page you linked suggests that to fix it,

"try adjusting the thread stack size of your Java Virtual Machine. With most Java distributions, this can be done by using the -Xss option of the java command, like in the following example:

java -Xss1024k -jar epubcheck.jar moby-dick.epub"

Do you know how to do that?