This behavior occurs when you try to add more columns than your Windows SharePoint Services list supports. There are limits on the number of columns that you can create in a Windows SharePoint Services list. The limits are determined by the column type that you use for the list. For example, you can create 32 columns in a list that contains number and currency information, but you can create only 16 columns in a list that contains date and time information.
With Windows SharePoint Services, you can create the following numbers of each column type for each list or library:
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64 Single line of text and Choice (drop-down menu or radio buttons) |
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31 Multiple lines of text and Choice (check boxes (allow multiple sections)) |
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32 Number and currency |
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32 Hyperlink |
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16 Date and time |
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16 Lookup |
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16 Yes/No |
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8 Calculated |