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The code you have already does that. If you are facing a problem the please tell us the cell address and we can check.
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The code you have already does that. If you are facing a problem the please tell us the cell address and we can check.

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Hi Saqib Husain, Syed<br />
<br />
it works first time, but if you save and close then open again it falls over<br />
<br />
Error 1004. No cells were found.
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Hi Saqib Husain, Syed

it works first time, but if you save and close then open again it falls over

Error 1004. No cells were found.

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so so simple ..... when you know how,<br />
<br />
thanks
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so so simple ..... when you know how,

thanks

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I have a specific [large] range of cells which, when the file opens gets populated if the cells are blank. If however these cells are already populated I do not want the code to overwrite what is already there. <br />
<br />
Can an expert provide me with the code that will prevent the cells being populated if they already have data in them.<br />
<br />
Many thanks<br />
<a href="https://filedb.experts-exchange.com/incoming/2015/05_w20/913980/don-t-overwrite.xlsm" target="_blank" class="file-inline" title="Don't overwrite (23 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>don-t-overwrite.xlsm</a>
</div>
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don-t-overwrite.xlsm

I have a specific [large] range of cells which, when the file opens gets populated if the cells are blank. If however these cells are already populated I do not want the code to overwrite what is already there. 

Can an expert provide me with the code that will prevent the cells being populated if they already have data in them.

Many thanks

populate if blank otherwise do nothing

Microsoft Excel topics include formulas, formatting, VBA macros and user-defined functions, and everything else related to the spreadsheet user interface, including error messages.