Hello,

Thank you all for your help. I now know how to avoid the error that I was getting. The reason why I was concerned by the error was that I did not remove any class like in your examples, all I did was several source commands on the same file. It appears that some filter removes tester.tcl from my attachment, so here it is:

package require XOTcl namespace import xotcl::* source extendedContainer.xotcl source c.xotcl

ExtendedContainer create ec

Currently I am using Ubuntu 9.04 with XOTcl 1.6.5-1.2 package.