uname -m on source Linux. If x86_64 , agent should be 64-bit. If i386 / i686 , agent should be 32-bit. In mixed environments, force the agent architecture by editing the Converter XML job file (advanced).
Then retry the conversion.
VMware vCenter Converter Standalone is a powerful, free tool used by system administrators worldwide to convert physical machines (P2V), virtual machines (V2V), and even cloud instances into VMware virtual disks ( .vmdk ). However, when working with Linux source machines, a notoriously frustrating error often halts the process: uname -m on source Linux