That was it. Thank you Martina.

>Add vcx to ClassLibraryName
>
>MartinaJ
>
>>Vcx
>>
>>>>This works as expected
>>>>
>>>>DEFINE CLASS ywmp AS form
>>>>
>>>>
>>>>When I try to do the following
>>>>
>>>>DEFINE CLASS ywmp AS ultx_AutoCenteredTopForm OF ultxbase
>>>>
>>>>I receive a compilation error telling me "Unable to find Program ultxbase"
>>>>
>>>>How should I do it?
>>>
>>>Hi,
>>>
>>>utlxbase is prg or vcx?
>>>
>>>MartinaJ