Ha! I created
a ticket for this very problem before I saw this in my inbox. (Sorry.)
But as it says on ticket, not only does it happen (with rnv v. 1.7.8) on my local system, it happens when I test with a tiny schema and a tiny file.
How do we throw more memory at rnv? It is a compiled C program. (Although it “uses Expat”, so could the problem be there?)
Answer: if we pass rnv the -s switch it “uses less memory and runs slower”.