wstring_convert::to_bytes ERROR


I am extracting data from SQL database that has some coordinates details (long, lat). There are several coordinate points in a single geometry data point thus the field is pretty large. When I try to load the field in R, I get the following error "Error in result_fetch(res@ptr, n) : wstring_convert::to_bytes"

If I run the select statement without the coordinates field, the results comes fine. Any suggestions on how to extract the coordinate data point?