This "option" is not on by default. So, either you turned it on, or there's another problem.

We discovered a problem on 4.5.5 where zmtrainsa wasn't training correctly. If you used a clean install, this could cause you large problems.

Bug 16177 - zmtrainsa reports "archive-iterator: raw location "-" is not supported"

If 4.5.5 was your first install, please upgrade to 4.5.6