I am working on a TCL application that uses level sets. The input to Fast Marching requires a NodeContainer. Was this left out of wrapping or am I just missing it. Thanks, Vince -- Assistant Professor Department of Radiology 0437 JCP E-mail: vincent-magnotta at uiowa . edu Phone: 319-356-8255 Fax: 319-353-6275 Website: http://www . radiology . uiowa . edu