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Fatal Error C1084

Cannot read filetype file: 'file': message

This error is generally the result of a failed internal system API call made by the compiler. The message shown when this error is encountered is often generated by either _wcserror_s or FormatMessage.

Performing the following steps may help resolve C1084:

  • Ensure the specified file exists.

  • Ensure the appropriate permissions are set in order to access the specified file.

  • Ensure the command-line syntax adheres to the rules outlined under Compiler Command-Line Syntax.

  • Ensure sure the environment variables TMP and TEMP are properly set, as well as the appropriate permissions in order to access the directories these environment variables refer to. Also ensure that the drives referenced by the TMP and TEMP environment variables contain an adequate amount of free space.

  • If the message says "bad file number", the specified file may have been closing in the foreground while compiling in the background.

After performing the above diagnostics, perform a clean build.

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