I am trying to combine multiple vector layers in QGIS using the "merge vector layers" function from the dropdown lists
(vector -> Data Management Tools -> Merge Vector Layers)
All data are point data but when I run the process it returns
"-2147483647 See log for more details" and when I open the log message panel it shows
"key error -214783647".
Can someone please explain what this error is and how I can remedy it?
Edit I'm using QGIS 2.18 The point data I'm using is waypoint data from 2 surveys which were uploaded to Google Earth and saved as a .kml file. I uploaded it to QGIS where each set of points shows as separate layers and would like to combine them into a single layer then save as a shapefile. link to data: https://drive.google.com/open?id=109K5lobpPGVHNVmG3R43nLUt1HTXHinH
I hope this clarifies some. I'm no GIS wiz.