Taco: [...] >> Here is what works for me. Accept or deny, I won't insist any longer. > > Applied, so there now is the new function tex.sp(<string>). > Both changes are in revision #3435. I confirm tex.sp function working as expected, including changed behaviour of dimen_to_number() . Thank you! -- Pawe/l Jackowski P.Jackowski at gust.org.pl