>>>Try

>>>SET grno=NVL(ID.grno,SPACE(6)) ;
>>>

>>>>
>>>>trying to update table using UPDATE-SQL and keep getting an error, that field "grno" doe snot accept NULL value.
>>>>First of all, it happens only when I run EXE, never in APP. and second, I am using NVL function to prevent any NULLs.
>>>>
>>>>Please see the simple code below:
>>>>UPDATE PS1;
>>>> SET PS1.grno=NVL(ID.grno,SPACE(6)) ;
>>>> FROM PS1 ;
>>>> LEFT OUTER JOIN ID1 ON UPPER(PS1.employeeid)=UPPER(ID1.employeeid)
>>>>
>>>>I tried to use INNER JOIN, but received the same error message.
>>>>
>>>>And by the way, I modified the table PS1 to allow NULL value in the field "grno".
>>>>
>>>>Any ideas?
>>>>
>>>>Thanks
>>>>Jerry
>>>>
>>
>>
>>Thanks Sergey, same error.
>
>

>SET grno=NVL(ID1.grno,SPACE(6)) ;
>

>You had a wrong alias there, used ID instead of ID1.

That was just a typo when I simplified the statement. The problem is still there.
Thanks