AlltoAvi Stops Encoding Prematurely

[Startropic1]

I'm trying to use Alltoavi to encode a folder of anime episodes in mkv format (to my knowledge alltoavi is the only program that can convert multiple files/folder) to avis but for some reason it stops in the middle of the encoding process and I end up with an avi that is half the size/length it should be. The avi plays fine but is obviously incomplete.

Edit: Tried to do the same with Super but got the same result.

Here's the MediaInfo report on the mkv files:
General #0
Complete name : [Name Deleted].mkv
Format : Mk
File size : 222 MiB
PlayTime : 24mn 12s
Bit rate : 1279 Kbps
Encoded date : UTC 2008-12-26 21:40:36
Writing application : mkvmerge v2.4.1 ('Use Me') built on Dec 5 2008 18:30:05
Writing library : libebml v0.7.7 + libmatroska v0.8.1

Video #0
Codec : MPEG-4 Visual
Codec profile : Streaming Video Profile/Level 1
Codec settings/BVOP : Yes
Codec settings/QPel : Yes
Codec settings/GMC : 0
Codec settings/Matri : Default
PlayTime : 24mn 11s
Width : 640 pixels
Height : 480 pixels
Display Aspect ratio : 4/3
Frame rate : 23.976 fps
Resolution : 8 bits
Chroma : 4:2:0
Interlacement : Progressive
Title : W_B
Language : English

Audio #0
Codec : Vorbis
Bit rate mode : VBR
Channel(s) : 2 channels
Sampling rate : 48 KHz
Language : Japanese

Audio #1
Codec : Vorbis
Bit rate mode : VBR
Channel(s) : 2 channels
Sampling rate : 48 KHz
Language : English

Text #0
Codec : UTF-8
Codec/Info : UTF-8 Plain Text
Title : 2xX
Language : English

[Braindrain]

I found Xvid4PSP will work where AlltoAVI won't. Also you get better output. If not, then AVS will probably do it (although not free).

[Startropic1]

Xvid4PSP would stop prematurely as well. Not sure what's going on.

[Startropic1]

does anyone know why these videos won't convert all the way?