Hi,
check LEN(''&{DESIGN: REVISIONS})
. maybe it’s less than 133 ?
also, always use this tag
for formulas and code, because otherwise quotes “chose the side” and formula won’t work after copy-pasting.
if the number 133 works for others, but for underscore it should be, 113 for example, you can substitute 133 with
133-20*(FIND('_',{fieldname})>0)
but maybe classic style even better - substitute 133 for IF(FIND('_',{fieldname}),113,133)