Prior to running Carlson PointCloud, you may want to enable the Windows user-mode 3 gigabyte virtual memory switch. This switch will enable Carlson PointCloud to address 3 gigabytes of memory instead of the windows default of 2 allowing it to handle larger data sets. Some video drivers may not load when the 3 GB switch is used. Typically, if you're going to work on a dataset of more than 5 million data points and create a mesh from it, this switch should be enabled. To enable this option, navigate to the root directory of the hard drive that Windows XP is installed on (typically the C: drive), and locate the boot.ini file. This file may be hidden, so visibility of hidden files may be needed to be enabled (done by going to the Tools menu in windows explorer and selecting Folder Options..., going to the View tab and selecting Show hidden files and folders).
In the boot.ini file, there should be an [operating systems] line, after which there will be lines that detail the operating system to load on system boot. Typically, there will only be one line following the [operating system] line, which will be the boot options for Windows. The Windows boot line should look something like the following:
multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Microsoft Windows XP Professional" /noexecute=option /fastdetect
Some of the numbers may be different and the name may be different depending on the version of Windows you're using (i.e. "Windows XP Home"), but the format of the line should be the same. Add /3G to the line to enable the 3 gigabyte switch, in the case of the above line, it would be changed to the following:
multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect /3G
The system will need to be rebooted to apply the changes, but afterwards Carlson PointCloud will be able to handle significantly larger datasets.