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Thread: Excel is using 100% of CPU. Where might be the trouble?

  1. #31
    Valued Forum Contributor vlady's Avatar
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    Re: Excel is using 100% of CPU. Where might be the trouble?

    @ Habanero
    the IF(ISERROR(LOOKUP(...............),0,LOOKUP(2,1/((.......................)) hundreds of them i think,, is the culprit here..i just deleted all of this formulas and it is normal again..
    jeffrey is right, a named ranged maybe!!????
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    Valued Forum Contributor OnErrorGoto0's Avatar
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    Re: Excel is using 100% of CPU. Where might be the trouble?

    See if this version improves the speed. I have added 3 named ranges, changed some formulas to use those ranges, removed the OFFSET functions and restricted the lookups to being used in one column only (new formulas in column A) and then the others use the row number returned in INDEX formulas. I also adjusted the summary table at the top to use SUMIF for the months.
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    Good luck.

  3. #33
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    Re: Excel is using 100% of CPU. Where might be the trouble?

    Quote Originally Posted by OnErrorGoto0 View Post
    See if this version improves the speed. I have added 3 named ranges, changed some formulas to use those ranges, removed the OFFSET functions and restricted the lookups to being used in one column only (new formulas in column A) and then the others use the row number returned in INDEX formulas. I also adjusted the summary table at the top to use SUMIF for the months.
    This is huge help (and a good lesson). Much appreciated. I've loaded the data back in and it's looking good, and I'm understanding what you did. I'm going to go over the math and see how it compares to the original one and its data.

    Everyone, y'all have been great!

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