It might help to add a symbolic breakpoint on "-[NSTableColumn
valueForUndefinedKey:]" and then poking around in the debugger to
figure out more context information about this exception, such as
querying the column's identifier and parent tableView.
As a general debugging measure, I've found it useful to set a
symbolic breakpoint at -[NSException raise], which catches all kinds
of things...
Ron Aldrich
Software Architects, Inc.
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