Very, very interesting:

Does anybody remember the random E1513 bugs "Crash in SYS" that Larry_Laffer with IntenseX, the guys behind Maniac Mansion 3D and William with Project Silas discovered? I`ve got them, too, now. They only appear RANDOMLY when the sys_memory (the used memory by the engine) is above 512MB and many c_trace functions are running parallely (my vegetation script. IntenseX made use of many c_trace funtions, too). When the used memory is above 900MB the engine also crashes randomly on every second to fourth level_load with "out of memory" although I`ve got 4GB RAM. These crashes are absolutly random. Sometimes the levels load without any problems, sometimes not. Sometimes there are some heavy slowdowns, sometimes not. And all those problems only appear when the memory usage is above a certain value.
Isn`t that interesting? IntenseX is dead because of those E1513s. Project Silas, although very optimized, has some trouble with E1005 and E1513s, too. It seems like most bigger projects reached that limit (look at the forum topics about e1005 and e1513). Hm..