#1572 Missing volume

[testcy]

When testing or extracting multiple volume rar archives (for example test1 rar archive with 5 volumes by right click on archive > 7-zip > Test archive) with 7-Zip 15.10 beta (64-bit) the following message appears:

1 C:\test.part1.rar
Missing volume: test.part6.rar

Where X is always the number following the number of the last volume. The archive tests and extracts OK if I open first the archive.