https://community.intel.com/t5/Software-Archive/insufficient-virtual-memory/m-p/932554#M15182 I like to allocate an array (complex*16) with 12000*12000 and get the run time error 41 insufficient virtual memory <BR />The maximum virtual available memory is 4GB <BR />A array 11000*11000 is allocating 2 GB only, so it seems there is enough memory Thu, 21 Dec 2000 05:15:06 GMT Intel_C_Intel 2000-12-21T05:15:06Z https://community.intel.com/t5/Software-Archive/insufficient-virtual-memory/m-p/932554#M15182 I like to allocate an array (complex*16) with 12000*12000 and get the run time error 41 insufficient virtual memory <BR />The maximum virtual available memory is 4GB <BR />A array 11000*11000 is allocating 2 GB only, so it seems there is enough memory Thu, 21 Dec 2000 05:15:06 GMT https://community.intel.com/t5/Software-Archive/insufficient-virtual-memory/m-p/932554#M15182 Intel_C_Intel 2000-12-21T05:15:06Z https://community.intel.com/t5/Software-Archive/insufficient-virtual-memory/m-p/932555#M15183 Almost. As far as I know, 2GB is reserved for OS purposes, so <BR />there's only 2GB for applications. Are you sure you really need <BR />the full matrix, i.e. can't you use sparse matrix technique? <BR /> <BR />Jugoslav Thu, 21 Dec 2000 08:33:32 GMT https://community.intel.com/t5/Software-Archive/insufficient-virtual-memory/m-p/932555#M15183 Jugoslav_Dujic 2000-12-21T08:33:32Z https://community.intel.com/t5/Software-Archive/insufficient-virtual-memory/m-p/932556#M15184 The maximum virtual memory for a process in Windows is theoretically 2GB, in practice, it is somewhat less, and you've exceeded that. If you need more, you'll have to move to a 64-bit OS such as Tru64 UNIX or Linux Alpha. (Or wait a few years for 64-bit Windows on Itanium.)<BR /><BR />Steve Thu, 21 Dec 2000 08:36:33 GMT https://community.intel.com/t5/Software-Archive/insufficient-virtual-memory/m-p/932556#M15184 Steven_L_Intel1 2000-12-21T08:36:33Z