convert cap to hccapx Solve the problem “Old hccap file format detected! You need to update 
If you crack WiFi password in Hashcat, then you know that Hashcat cannot work directly with network capture files (.cap or .pcap), these files need to be converted to a special Hashcat format. For conversion to the format in the .hccap format, a bunch of wpaclean programs (for cleaning extra data) and aircrack-ng (for the conversion itself) were usually used.