.

utils/interpolate.cpp

@@ -185,7 +185,10 @@ Vect6 XInterpolator::get_pos(const TimeJD& date, const bool tks) const
     }
 
     if (!(date >= m_beg && date <= m_end)) {
-        throw Exp() << "interpolation date out of range\n";
+        throw Exp()
+            << "interpolation date out of range\n"
+            << "date is " << DateToStr(date) << "\n"
+            << "inerval is " << DateToStr(m_beg) << " - " << DateToStr(m_end) << "\n";
     }
 
     double outvec[6];