From your expression it seems that you are trying to assign a value to the 'indFinancialInstitution' attribute. However, since you are already editing a change item for that attribute, you can simply write the value you want to assign.
In this case, you can probably replace the entire expression by:
$sic87='6141' or $sic87='6371' or $sic87='6723'
Try
if ( $sic87='6141' or $sic87='6371' or $sic87='6723') then true else false
Hi Benny,
Thanks for your answer. It indeed solves the problem I had and the code is more compact. However, I dont understand why the solution I had did not work.
Hi Benny/David,
Thank you both for your prompt answers. Now I know how to use the expressions correctly !
Regards, Arun