The error 12002 QuickBooks is caused by a memory leak in the program. Memory leaks are when there is a big amount of memory used up but not enough return to the system that caused it. this error 12002 QuickBooks If left to continue, the memory will overflow and cause problems with other programs, and even make a computer crash. To fix this issue, you must clean out your RAM to release all of the files that are still in there without being used for a long time. This can be done through disk cleanup in your Windows settings (Press Windows + X and click on Disk Cleanup).
