When I tried to create a par2 file set for a 2.7GB data file, par2cmdline failed and gave a reason with nonsense numbers. In another test, I successfully created a par2 file set for the 2.7GB file divided into three 1GB partial files. When I tried to recreate the partial files using the original 2.7GB file as the source, par2cmdline froze after displaying "Scanning extra files:" and consumed all CPU time until I killed the process.
This problem was experienced in par2cmdline version 0.4 in 32-bit Windows XP SP3 using simple command line parameters (no advanced parameters such as block size, par2 file count, etc.).
ToonPal