Hello, This problem is very simple. The text input for geometry no longer recognizes units. For example, this USED to work: :P WindowSize 0.5*m for 1/2 meter. Working around this problem is fairly easy. One can just put everything in in mm. :P WindowSize 500 Or do a global search and replace of "*m" to "*1000". Best, --PeterM
Just substitute else if( !G4tgrUtils::WordIsUnit( word ) ) by else if( G4tgrUtils::WordIsUnit( word ) ) in source/persistency/ascii/src/G4tgrUtils.cc
*** Problem 1259 has been marked as a duplicate of this problem. ***