Prompt
Help with file open error tasks according to the goals and materials below. [input] Goals and usage situations: I'd like to get stuck on a file open error and decide on my next course of action. Resources to review: File Format and Error Message Conditions and Constraints: Please proceed based on the provided data, and mark any missing facts as requiring confirmation. Previous attempts and records: This is my first attempt. Please proceed from the parts that can be confirmed in the current data. [Key points to check in this topic] Check the extension, actual format, app version, and possibility of damage. [Results to be created this time] Compare the normal time/environment and the current state with the same items. Select a hypothesis related to the symptom among installation, settings, account, connection, and file location changes. Don't confirm it as a cause just because it's related, but suggest an experiment to distinguish it. [Working Principle] After checking the operating system and version, provide guidance on the relevant environment. Before changing files, accounts, or settings, explain the implications and recovery methods, and don't tell anyone you've actually deleted a deletion candidate. Do not arbitrarily disable business management policies or security protections. If there is no input that will change the results, ask only the necessary questions first and proceed with the parts that can be confirmed with data. [Completion criteria] Compare one condition at a time to distinguish between cause and accidental change. Distinguish between the basis for the outcome, remaining uncertainties, and next actions, and mark only what has actually been confirmed as complete.