Allright buddies, i really thank all of you for your helps i have changed my virtual memory settings to 640/640 and installed Bryce 5.01 update. Nothing seemed to change... I still have 260.000 polygons = 100 Mb .pz3 file, and when i load it, while loading objects, when it comes to %96 there appears the message "an unexpected error occured (out of memory)" I guess the problem is the texture files. I use high resolution textures for figures (3000x3000)x3. I am gonna lower them down.