Hi Boban

This is not a bug because your calling program is passing, for instance, 5 parameters but your UDF only has LPARAMETERS receiving statement for 4 which is causing the error to occur. From the VFP help "There must be at least as many parameters in the LPARAMETERS statement as in the DO ... WITH statement. "

You can allocate up to a maximum of 27 parameters to cater for more parameters than 4.

Jos


>I have put PARAMETERS() below the LPARAMETERS to see how much parameters have been passed to my UDF.
>I have put to see if there was a too low or too many parameters passed.
>
>It goes something like this.
>
>

>
>FUNCTION myUDF()
>     LPARAMETERS para1, para2, para3, para4
>          IF PARA() < 2 OR PARA() > 4
>              RETURN .F.
>          ENDIF
>and rest....
>
>

>
>
>Now, if there are less parameters passed it returns .F., everything is OK.
>
>But, if there are more parameters passed (in this case more than 4), it displays error before program reached to the line where is IF statement, and program is out!!!
>
>Why is this happening? Is this a kind of a bug?
>Is there a way to avoide this?