The Jeterr40.chm was a Windows help file that no longer exists. The error message is actually a Windows error message so there is no way for MTU to remove the Help button from the dialog box. There is no help function for this error.
The question is how many times did you get the error message about the Field? If it is only once then you have one song file that has a corrupted header and will need to be re-imported. The problem is trying to identify exactly which file it is. If it is more than one it just complicates it more.
The only way I know of to find the file is to note the number(s) that the rebuild stops at and shows the message. This would be the record number in the Songs.MDB (database file). You would have to open Songs.mdb in Access or an Access viewer and locate where that record number goes and determine by the listings around it which Brand DiskID and Track number was missing.