>Hi, I've a quite complex form class.
>If I try to run it using createObject, I receive this error:
>Error code 2070, "Cannot assign a class value to this member"
>
>The error isn't included in the help, did you ever see it?

The VFP9 help says:
An attempt was made to assign the Class property a value that was not an object reference.

It seems to indicate that there's incorrect value in the Class property of one of the objects. I would open the form as a table and look through Class and Classloc memo fields for something unusal or incorrect.