[Yaffs] Problem reading YAFFS file content

[Zhang Bill-BZHANG2]

I am trying to use yaff2-direct (in bootloader)  to scan and read a
YAFFS1 partition which is created by Linux OS(ARM).  I was able to open
the file, but yaffs_read always return 0s in the buffer.
 
I also tried to use yboot.c ,  and debugging shows that tags.chunkID
could not be found for that file/objectID.  But if I login to Linux, I
am able to read the whole file.
 
I already set the is_Yaffs2 to 0 , any clue why this could happen? 
 
We will decide whether to buy YAFFS2  License base on my investigation.
Our bootloader is proprietary and OS is GPL.  
Thanks
Bill
 
 
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