Hello,
Can any one tell me what are the common errors while testing MF application?
Probably not. . .
The mistakes made by one person or group will be quite different than those made by some other person or group. What is "common" will be learned and is accumulative - the more variety you experience, the more "things" become common.
One thing to watch with jscan is that some things are shown as error that are not. SUB merely causes something to be turned over to the system to exedcute
If you have something more specific question post that and someone should be able to clarify.