I have a suggestions, but I'm not giving any warranties:
Code:
NSMutableArray *myMutableArray=[[NSMutableArray alloc] init];
for (int i=0;i<10;i++)
[myMutableArray addObject:[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"img000%d.png",(start+i+1)] ofType:nil]]];
self.myImageView.animationImages=myMutableArray;
[myMutableArray autorelease];
Try to use autorelease for a local object with alloc/init method.