Private correspondence
Email emfls24777@daum.net. This is the operator's established GuideHollow contact address, also used for GuideHollow Sheets. Do not send a real workbook, personal records, passwords or API keys unless an appropriate, separate sharing arrangement has been agreed.
Public issues and source history
You can open an issue in the GuideHollow Sheets repository. A GitHub account is required to submit an issue, and its content is public. Read existing issues before reporting a duplicate.
A useful report includes
- The page URL and affected formula or instruction.
- Your app, version and locale when relevant.
- A small fictional input that reproduces the problem, with expected and observed results.
- The exact error, without personal data or credentials.
- An official documentation link if it helps establish the correction.
We cannot guarantee a response time or provide individualized financial, legal or professional advice. A report starts an editorial review; it is not an agreement to access a private account or change a workbook.
Privacy questions
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