Problems with Performance

See the Performance Tips topic for advice on improving system performance.


System appears to be locked up.


·      Are you sure the system is busy? Check the System Activity indicator in the in the status bar at the lower right hand of the screen. When the system is busy it will show a 3D "bump". It could be that the system is not busy but has been put in a command mode, such as setting a control point, where the cursor will not be freed until the chosen command is taken to completion. Press the Esc key to exit a command mode. Check command button and status line to see if any commands are enabled.

·      Does the system activity indicator show the system is busy? If Manifold is busy it cannot execute a new command for you. Some commands (such as sophisticated networking analytics) can take a very long time to accomplish. See the discussion in the Performance Tips topic about scaling up tasks very slowly to avoid unpleasant surprises.

·      Is another application or Windows locked up? Try pressing CTRL-ALT-DEL (in 2003, XP, 2000 and ME) to see if this unlocks the console.

·      Are you using Windows '98? These systems do not have the memory management sophistication of Windows Server 2003, Windows XP, Windows 2000 or Windows ME and will routinely lock up when significant amounts of memory are used. Switch to a modern Windows edition.

·      For normal operation you should have four times the maximum size of the files in use available in free disk space. If you are working with a 100 MB image you should have 300 MB free on disk. The extra space is needed to keep temporary versions of the image to allow Undo or abandoning of edits as well as to provide space for copy and paste operations.


If you can reproduce a system lockup or crash using Manifold, please send a note to with step by step instructions on how to reproduce the problem. Reproducible system hangs or crashes go to the top of our engineering priorities for immediate repair.


Unknown Errors


Manifold cannot work correctly if your machine does not have adequate RAM, an operating system that can handle the necessary RAM, or adequate disk space.


·      Are you using large images? Many image formats are compressed. When imported, the images they contain will expand to require considerably more RAM than indicated by the size of the file on disk.

·      Are you using Windows XP or 2000? If not and you are working with larger projects you have probably encountered a bug in Windows, not in Manifold.

·      Do you have enough free space on disk? Larger projects should have gigabytes free on disk.

·      Is your page file large enough? Allow 2.5 gigabytes per running instance of Manifold.

·      Are you running other applications at the same time as Manifold? Other applications could be using up RAM that is needed for Manifold.

·      See the Performance Tips topic for additional information.

·      See the Memory Requirements topic for important information on RAM and hard disk memory requirements.


Disk Space


·      Always double-check you have enough free space on hard disk. If you have no free space on hard disk, Manifold will not be able to function because there will be no room for temporary files.

·      Even if you have plenty of free disk space, check the location of the TEMP folder for Windows. If the TEMP folder is placed on a disk partition that does not have enough free space, Manifold will not be able to function correctly.

·      If you work with linked images, clean out your cache files from time to time. Cache files persist forever and, in extreme cases, use up your free disk space unless they are manually deleted. See the recommended actions in the Managing Cache Files topic.


Important Configuration Notice


Very Important: Before starting Manifold, go to the Windows Control Panel Display dialog Effects tab and make sure that the Show window contents while dragging check box is not checked.


·      In Windows XP this option is found in the Control Panel's Appearances and Themes - Display choice under the Appearance tab by pressing the Effects button.

·      In Windows XP or Windows 2003, from the Start button open the Control panel and then open the Display dialog. Click on the Appearances tab and then press the Effects button. Uncheck the Show window contents while dragging check box.

·      In Windows 2000, Windows ME and Windows 98 open the Control panel and then open the Display dialog. Click on the Effects tab, and uncheck the Show window contents while dragging check box.

·      In Windows Vista, open the Control Panel and click Appearance and Personalization. Click Customize colors, then click Open classic appearance properties for more color options and click the Effects button. Uncheck the Show window contents while dragging check box.


Checking this box will greatly slow down the system when displaying complex maps and images because it forces a refresh of the window contents with each minor change in mouse position while dragging the window. Make sure the box is unchecked.