With new version 2.7.4.1 getting a critical error every couple of hours. The program shuts down and you have to restart it again.
As always in such cases, I need more details to be able to reproduce this.
Are you running it on a VPS or your computer?
How many markets are being refreshed simultaneously?
Do you run triggers? If yes, I'll need to see them or turn them off and see if the program will keep crashing (to establish if the problem is with the triggers).
Do you use Market Locator? If yes, how often and what search template are you using?