Mega late but an AMZ for Ice Age Village from Gameloft's beta testing servers fails to extract. According to the file, it doesn't have the version in the header. You can repair AMZ files with WinRAR's repair archive function for ZIPs but not sure about ones with folders inside.
Error: incomplete input file 0: IAV_ANMP_v017_HD+_fixVer.amz Can't read 2 bytes from offset 504b0800. Anyway don't worry, it's possible that the BMS script has been written to exit in this way if it's reached the end of the archive so check it or contact its author or verify that all the files have been extracted. Please check the following coverage information to know if it's ok.
The only difference is that such AMZ doesn't have the version string. You can manually remove the "get NAMESZ + getdstring NAME + get ALIGN" part from the script or wait the new version I will upload later.