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This function relies on vtc.VOITimeCourse method, which has been changed from v0.9c → newer versions. The new method is AFT::VOITimeCourse, in versions v0.9d and 1.0, this method works only with TAL vois. The method vtc.VOITimeCourseOrig is kept for backward compatibility (works with both BV and TAL vois).
ne_era.m takes care of this: