Hi 3DWinter,
from the API reference manual, the columns parameter in exportReference method can contain following:
columns (string) – Column order in csv format (n - label, o - enabled flag, x/y/z - coordinates,
X/Y/Z - coordinate accuracy, a/b/c - rotation angles, A/B/C - rotation angle accuracy,
u/v/w - estimated coordinates, U/V/W - coordinate errors, d/e/f - estimated orientation angles,
D/E/F - orientation errors, p/q/r - estimated coordinates variance, i/j/k - estimated orientation
angles variance, [] - group of multiple values, | - column separator within group).
So I do not think you can export projections and error(pix) with this method. It could be done by python script...