You have to declare the array as external with the EXTERNAL command:

EXTERNAL ARRAY ASYSDATA

Take a look at the EXTERNAL command in help.

HTH
Franco

>When I compile and build an application, I get the following error:
>
>

>Program d:\myapp\programs\appsetup.prg has the following errors:
>    Unknown ASYSDATA - Undefined
>

>
>The aSysdata is an array passed by reference to the INIT method of the class in appsetup.prg. The code is basically like this:
>
>

>Procedure INIT
>LPARAMETER aSysData
>

>
>The compiler error I get (above) does not really stop program from working. But I was wondering, why do I get this error and perhaps how to get rid of it?
>
>TIA.