I asked this question here, but figured it might be worth starting a new thread.
I have a QVX file with many columns (thousands). When I try loading into Qlik, the column names don't appear in the wizard and hence the load script. If I reduce the number of columns (600), the wizard shows the column names, but the script will only generate up to 549 names. The remainder just show up as lines of ,'s. Interestingly, a CSV with thousands of columns loads correctly.