I want to merge 9 shapefiles (all polygons) into one file. The problem is, when I try to merge more than two files at once, I seem to loose attributes on the way? Is there any other way of merging shapefiles than using the 'Merge shapefiles to one'-tool? In this case it's only nine files, so it's possible to merge whem 2 and 2, but I want to do the same thing with other files as well, and then merge about 20 files to one.
I'm using QGIS 2.0.1.
EDIT: I have data of 4 different kinds of natural reserves (polygons). Each reserve has data seperated into three different shapefiles, where each shapefile is cooected to a powerline. The three powerlines are parallell at first and then turn in different directions.
Each kind of natural reserve contains slightly different information, but they all contain the columns 'Powerline' (powerline identity) and 'Type' (type of natural reserve).
I want my output to contains all of the polygons and all attribute data. What happened was that information like 'Powerline' was lost when I tried to merge all files at once.