Sergey,
Here running the code you send it gives me the same error posted by Ahmed !

> don't see this. Here's the test I run.

>OPEN DATABASE (HOME(2) + "Data\testdata.dbc")
>USE products
>COPY STRUCTURE EXTENDED TO tstru
>CREATE testxx from tstru

>>Hi All,
>>
>>I'm testing my vfp7 app under vfp8 beta.
>>The line of code I'm having error is:
>> CREATE filename1 FROM filename2
>>
>>Now, in filename2, under field 'field_name' I specified names that have underscores in them.
>>
>>It says: "Field name is duplicate or invalid"
>>
>>It ran just fine in v6 and v7, but v8 beta boms. To run without error in v8, you must remove the underscores.
>>
>>Can someone verify if this is a bug?
>>
>>--Ahmed