This issue was caused by two things noted below along with the associated work around that resolved the issue. This issue is now resolved in patch 14.63 and the work-around is no longer necessary. HostNet will be upgraded to patch 14.63 on 9-11-2018.
1. The csv file name having a space in it
2. and\or the folder pathway itself having a space in it, for example C:\My Documents
Remove any spaces in the csv file name and also place the csv file in a folder with no spaces to use for import, for example, C:\Import, and then name file mytestimport.csv, so the entire path would be for example, C:\import\mytestimport.csv