hmm.. what are your memory settings in the .bat file?
Yes, "Disable History" should help, but it will disable the diagrams as well..
This is one of the issues we want to address with the outlined improvements, which would for example allow you to write statistics to a file for long-running tests..
Recovering from an outofmemory is usually difficult.. do you have a stack-trace I can look at from when you got the error?
Sorry for the inconvenience...