Thanks Jurij for all your wonderful explanation!

It appears to work now...

I will take the substr part out. The reason for me to put it over there is since I got 'Field in data file exceeds maximum length' error on that column AND I assume that column should be able to hold 2000 characters. But actually, as you just point outed, that column by default will only hold 256 characters, which is the real reason for me to get that nasty error.

Thanks again and really appreciate your help!