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As you see, when I test, I test heavily !!!
Another problem :
I have exported a tDBmysqloutput schema in an xml file and try to import it in a tDBmysqlInput component. But nothing appears in the schema window, no column are imported...
I try it in the "edit shema" window of the component properties, and in a metadata shema : nothing works.
This bug in our bugtracker is already exist [Bugtracker, bug 658, fixed] Export / Import external XML Schema don't works. and was resolved for TOS version 2.0.0M2 soon available.
You can show the status of your bug and the history of this resolved problem [Bugtracker, bug 688, duplicate] xml schema import don't work.
I have just tested it in tMap component : it replace columns in schema editor, but it *add* them in output window (old columns remain in list, new are added at top. The links remain on old columns).
I think it's just a display bug, because if you quit the window with ok and return, the schema and output are ok, and links too.