Error - 'The file exists' when running a Crystal report, or printing anything

This is caused by too many items in the Temporary folder on the Web server that runs FocalPoint. The folder is located in the following directory:
​C:\Windows\Temp
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If there are more than 65,535 files in this folder, the system will throw this error and Crystal reports or templates will not run.
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Please delete files urgently on all web servers to resolve this error message
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If you are hosted with us, then please raise a new case and reference the title of this article.