In order to run Sybase IQ in Linux Xen DomainU or VMWare ESX guest OS partition, you must first create an environment variable that instructs SySAM to check for a virtual machine.
For Xen, set SYBASE_SAM_CPUINFO=Xen or SYBASE_SAM_CPUINFO=XENCHECKXEN.
For VMWare, set SYBASE_SAM_CPUINFO=VMCHECKVM.