Validating a Notes formula from LotusScript

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This code can be used to validate a Notes formula before using it in an Evaluate() statement or in a call to db.Search(). It will also tell you the offset of any error. I use it in a Web interface to create customized reports to mimic Domino Designer's "Check formula" functionality. It uses functions in the Notes DLL, as documented in the Lotus C API, example code support Win32 (look here for help on using the same code on another platform).

Here's an example:

Removing the "@" from the @IsAvailable keyword should give you those results:

Formula error: @Function or operator expected, or @Function does not require an argument. Error starts at character 47 and ends at character 47, which is the last parentheses.

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I think this is a great tip! The writer suggested using it prior to any Evaluate() call. I suggest using it ...

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to debug any @Formulas you are working with during routine development.

I created a simple form that I put in my utilities database and will use it all the time. The form has one field and one action button. Put something like this in the button:

You may also want to check out another tip, called Formula debugger. It's very similar to the tip listed above.

—Doug J.

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