>If calcweight is a field, you can not write "calcweight=use_size*use_size*blunt*.222" to update a field.

>Replace calcweight with use_size*use_size*blunt*.222

Using Replace wouldn't be appropriate because calcweight isn't a field in a table.

>Or if calcweight is an object, you must write

>calcweight.value=use_size*use_size*blunt*.222

Where would I place this? And do I need to change anything else I mentioned originally?

Thanks!