At 03:06 PM 9/06/2005 +0200, you wrote:

> >My quick tests indicates that UDF parameters that are declared using
> >CSTRING will generate the error that you are seeing, but I haven't
> >taken the time to test with using VARCHAR.
> >
> >Is the UDF parameter declared using CSTRING? If yes, try declaring it
> >using VARCHAR instead, just to see what happens.
> >
> >
> >
>How do you do that in C++? I suppose the function has to accept other
>type than char*...
>Do you know of any manual?

There is a paper on writing UDFs with descriptors here:

http://www.cvalde.net/document/using_descriptors_with_udfs.htm

Helen