timstohr wrote: I increased to 512 but still same problem. Used php.ini on plesk to increase limit. Did not work. Still same message.

If you did increase you should have gotten a different message.

www.joomlapolis.com/faq/18200-checking-your-php-memory

oops, I need to fix the reference to the memory tester tool that never migrated from the previous docman download system to cb packager.

Send me a PM and I will email it to you.

Unpublish plugins 1 by 1 within CB > Plugin Management until issue goes away. You've an infinite loop somewhere just eating memory until it runs out.

(on frontend I am getting the message: User registration blocked: Reason: Already logged in).

That's CB AntiSpam and its Duplicate Login protection that you'd of had to of enabled. It has nothing to do with Registration. It doesn't act on any registration triggers what so ever. If you've the Auto Login system action in CB Auto Actions enabled that'd explain why you see that error after registering. Beyond that I've no idea.