An error occurred while trying to read data from a file created by a build job that was run by an agent on the same host as emake itself. The path in the error message indicates the specific path, which will be a temporary file inside emake’s backing store. The OS error message provides the specific cause of the failure. Note that this is not considered a fatal error because emake can retry the associated build job on a different agent.
Because the error involves an external system in this context (the filesystem on the emake host), the list of possible causes for this error is virtually limitless: a corrupted filesystem; hardware failure; insufficient permissions; and so on. However, this error is very unlikely to occur in practice because the file being read was created by eMake itself earlier in the build.