SOOO SLOOOWW!!! Excel 2007

I don't think you can. It's a real resource hog especially if youre using 2010/13. See below.

Excel 2003 is officially limited to 1 Gigabyte (GB) of memory.
This limit appears to be a limit on the working set memory used by the Excel process, which is the memory reported by Windows Task Manager.
Although Excel 2003 has a substantially increased memory capacity, many of the individual specific memory limits listed below have not changed in Excel 2003.

Excel 2007 is limited to 2 Gigabytes of memory for the Excel process under Windows XP/Vista (Windows memory limit).
This 2 Gigabyte limit is a limit on the Virtual Memory address space. Virtual memory used by a process is larger than the working set memory reported by Windows Task Manager, so the amount of useable memory under Excel 2007 is considerably less than twice that of Excel 2003.
Because Excel 2007 (Excel12) also requires more memory to store the indexes to the increased number of rows and columns you may not be able to load larger workbooks under Excel 2007 than was possible under Excel 2003. Memory Fragmentation may also mean that it is difficult to make use of all of the available 2 GB of virtual memory.

Many of the individual memory limits listed below have been removed in Excel 2007.

Excel 2010 is available in 2 versions: 32-bit (2 Gigabytes of virtual memory) and 64-bit (8-Terabytes (which is 8000 Gigabytes of virtual memory)).
The 32-bit version has the same memory limits as Excel 2007, but the 64-bit version, when used with a 64-bit Windows operating system, will have extremely large memory limits.
Note that the different versions of Windows Vista 64-bit and Windows 7 64-bit support differing amounts of RAM.

Read this link "How to Fix Error 1311", HERE.

Hope it helps.

try to re install excel 2003 or get the upgraded 2007!! or save two one project in parts!!

Microsoft Office Professional 2007 contains:

Microsoft Office Word 2007

Microsoft Office Excel 2007

Microsoft Office PowerPoint 2007

Microsoft Office Outlook 2007 with business contact manager

Microsoft Office Publisher 2007

Microsoft Office Access 2007

Use the Internet force, Luke.

http://www.bing.com/search?q=excel+2007+easter+egg

to find lots of "Easter Egg" bonuses.

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use Microsoft office file converted on other machine to open office 2003 files. Download this converter from Microsoft Site

some colors are not available in office 2003

under (office 2007) excel options (alt-t-o), save tab, you can choose which colors will be seen in previous excel versions.

Step 1: Go to Msoft update and make sure you have all the latest Office service packs/issue fixes for Office 2007.

If that doesn't work, go on to:

Step 2: Are you using wizards to create the code to do this functionality and if so, what ones? Post here.

Are you trying to open a .xls file instead of an .xlsx file? Xlsx is the excel 2007 file format. Another cause could be a lack of free space on your hard drive. Uninstalling the 2003 version or defragging could do it. One last question: XP or Vista? I find Office 2007 works better with Vista. Good Luck! ---- JG