|Build-A-Board®: for Windows; The Next Generation of Onscreen Keyboards; Version 2.20 Release 3; User's Guide|
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When opening or building board with many keys (est. 200+), it is possible that some systems will remain in loading or building state for a long period of time, or actually not complete the process. During the load and build process, the Build-A-Board Text Compiler gets initiated for each window, panel, key, etc., and when there are many keys, there can be hundreds of processes of the Text Compiler launched to compile each source file - see Build-A-Board Text Compiler notes.
If you experience this on a system, be sure to check for proper system memory configuration, virtual memory configuration, and free disk space. You can refer to the Task Manager to see if there are any BABTCU.EXE processes running (and you can end these processes within the Task Manager to cancel the load or build process - note, however, that results will be incomplete, and Build-A-Board should be closed without saving any projects). You may wish to reset the system, and check system logs for any system issues that may affect memory or the ability of the system to launch and run processes.