I am trying to manually upload my data from the now obsolete Garmin Training Center to Garmin Connect. I have exported a file from Training Center in .tcx format to my computer desktop. The file is 25,269KB in size. When I try to manually import the file in Garmin Connect, I get this error "An error occurred with your upload. Please try again later." I have tried repeatedly and get the same result. Is the file too large? The file is one year's worth of running data. Suggestions?
Update - To test the theory that the file is too large, I was able to export the data from Training Center into two separate files one is 15,902KB and the other 9,369KB. Neither file will upload. copy of error message attached "X Undefined". What is frustrating is that I have uploaded history files from 2011, 2012, 2014, 2015, and 2016.