Emake created a local temporary file but was unable to delete it.
Emake sometimes creates local temporary files, often as response files containing command line arguments. This warning triggers when emake fails to delete such a file.
Probably something changed between the time when emake created the temporary file and the time emake tried to delete it. For example, a build step may have altered the permissions of the file or its containing directory.
If filesystem permissions changed, either eliminate that change or find a different place to locate the temporary file. If the temporary file must be relocated but its location is not under user control, then contact product support.