[ownedbycats]

When I run the following template on a book that has "Not Set" in my #chapters (composite) column, it gives me EXCEPTION: could not convert string to float: 'Not Set'.

I thought that the check on line 7 would prevent it. Did I make a mistake and leave out an else or misunderstand the != compare?

program:
f = re($#chapters, '(.*)/.*', '\1');
s = re($#chapters, '.*/(.*)', '\1');
newpercent = round(multiply ((f / s), 100));

	if 
		$#chapters != 'Not Set'
			then 
## updates #percentread for updated fanfics comparing no. of read chapters to total. 
## fanfic_unreadchaps() check for unread chaps based on kobo bookmark.
				if and(
					fanfic_unreadchaps(),
					$$#percentread ==#100,
					) 
					then 
						if 
							newpercent <#99 
						then 
							newpercent
						else 
							98 
						fi 
				else 
					$$#percentread
				fi

		else $$#percentread
	fi

EDIT: Commenting out line four makes it return #percentread (expected result). Was it trying to do math even if there was nothing matching for f and s? I guess I need to fix the newpercent bit somehow or rearrange the template so that lines 2-4 run after the 'not set' check.