Here's my process (always worked before)..
.WAV extracted from .AVI through Cool Edit Pro, and saved..
.WAV to .AC3 with BesweetBeta, and BesweetGUIv0.6.

Besweet kicks out..
Thought i'd give FFmpeggui a try..Similar results. "Tprogress bar out of range".

Encoded to .MP2 with good 'ole Toolame, worked fine.
Ironically, if i take any sample of the audio, Besweet encodes fine .
..Could it be a filesize issue???
Is there some sort of .WAV header that might be giving me problems??

Here's the .WAV info:

Folder: F:
File Type: 48000Hz, 16-bit, Stereo
Uncompressed Size: 37.73 MB (39,563,604 bytes)
File Format: Windows PCM
Windows PCM
Size on Disk: 2.03 GB (2,187,047,396 bytes)
Last Written (local): 6/30/2004 19:44:10.070
Length: 3:09:50.871
03:09:50:26 drop
546,761,813 samples

Here's FFmpeggui status:

Input #0, wav, from 'F:\Svadba1forsound.wav':
Duration: 03:09:50.8, bitrate: 1536 kb/s
Stream #0.0: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s
Output #0, ac3, to 'I:\Svadba1forsound.ac3':
Stream #0.0: Audio: ac3, 48000 Hz, stereo, 192 kb/s
Stream mapping:
Stream #0.0 -> #0.0
size= 151kB time=6.4 bitrate= 192.0kbits/s
size= 255kB time=10.9 bitrate= 192.0kbits/s
size= 410kB time=17.5 bitrate= 192.0kbits/s

Any help would be appreciated..