#100 fix error message in case of collection reference addition
#100 fix error message in case of collection reference addition

OpenConceptLab/oclapi,burakince/oclapi,molgun/oclapi,molgun/oclapi,burakince/oclapi,OpenConceptLab/oclapi,molgun/oclapi,emrah-b/oclapi,OpenConceptLab/oclapi,emrah-b/oclapi,hevalberknevruz/oclapi,snyaggarwal/oclapi,molgun/oclapi,ayseyo/oclapi,snyaggarwal/oclapi,burakince/oclapi,emrah-b/oclapi,ayseyo/oclapi,hevalberknevruz/oclapi,snyaggarwal/oclapi,OpenConceptLab/oclapi,OpenConceptLab/oclapi,ayseyo/oclapi,emrah-b/oclapi,snyaggarwal/oclapi,burakince/oclapi,hevalberknevruz/oclapi,hevalberknevruz/oclapi,ayseyo/oclapi