>You said that this function just hide the real issue! , probably but in real life we couldn't fix all sql statements because there are more than 3000 (I guess) in our project.
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>I would like to know if some unexpected behavior could be hided in the SET enginebehavior?
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>if this just make my project to work as vfp7 , I would be very happy and this will be enought for us.

I suggest that, when you have the time, you fix your sql statements one by one. My guess that only a few will need to be changed. Since VFP will report an error for the statements which are not correct, and thus not allowed with enginebehavior=90, the job is probably not as hard as you may think. And you will sleep better afterwards. :-)