David,
Thanks for providing such information.
Actually the method I wanted to have 16 parameters (intially they were 27, and finally I ended with 16+3) was a factory method for instantiating class and passing parameters to it. I wanted to name the parameters passed like vuParameter## where ## stands for the number of the parameter. Try to create such a method in a VCX and when you subclass the class with such a method, you will encounter the situation I mentioned. At first I was confused about what is causing the fatal exception, but finally I came to idea somithing in my method is the reason.
I worked over it by renaming my parameters, and now they have names like vuParam##

(You may find the naming convention strange, so I will explain it: v stands for value parameter; u stands for unknown type. The opposite of value parameter is parameter by reference, for example fcResult - character parameter by reference)

>Zlatin,
>
>Ok based on running this code:
>
>

select expanded, 00 + iif( occurs( '...',tip )>0, 27, occurs(',', tip) + iif(empty(tip),0,1)) as args ;
>  from foxcode ;
>   into cursor funcargs ;
>   where type = 'F'
>
>select args, count(*) from funcargs into cursor x1 group by 1 order by 1

>
>We get this distribution of number of arguments to the builtin functions:
>
>

># Args       Cnt       	
>     0         3
>     1       193
>     2       111
>     3        69
>     4        20
>     5         8
>     6         4
>     7         1
>     8         1
>    27        11

>
>The 27 arguments occur because of functions like min(), max(), createobject()

Kind Regards