emake was not able to set the timestamps on the file specified in the warning message.
In the process of committing build results to disk (here, explicitly setting file times because of a touch command or similar during the build), Electric Make (eMake) was unable to change the timestamps on the named file. The OS error message provides the specific cause of the failure.
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. Refer to the specific OS error message to determine the cause of the failure.
The fix depends on the cause of the error.