can't convert image

[roytam1]

output:

Decompressing HD-COPY Image
Input size = 977088
That is an HD-COPY 1.7 Image
maxTrackCount = 80, secPerTrack = 15
Floppy sector count = 36544, fitting to 18710528 bytes
Decompress operation completed, write it to file

but resulting 0 byte file.

sample:
N1.zip