IF ERR on CHange

[Richard Giering dick.giering@xxxxxxxx]

I am trying to use the IF statement: [if
[err]][EI] appended to a change statement in a
program. It appears to be ignored. I have used
it in conjunction with a SEarch command and it
works OK. Does anyone know why it is ignored for
a CH command?
 The program is used to convert the special
characters that arrive with the results of a
form. The characters are in the form of "%xnn"
where nn is the hex definition for the special
character. For example %X2b is the plus sign and
%x2c is a comma. If the special string is not
found in the complete message the results are an
alert box indicating NOT FOUND. I want to ignore
the not found condition BUT the IF doesn't do it.
Thanks
Dick Giering