The maps for the specified data objects cannot be combined
into the target map file.
There is a call to the public static void
combineMaps(String datastore, String
targetMapName, String[] source, boolean updateScriptDefs)
method from ObjectMap class. The source array that represents the
source data objects contains the name of a file that does not exist
or is not a map file or a script definition file. The sourceName source
data object must be either a map files or script definition files.
Specifying any other type of file is not valid and causes an error.
Make sure that the sourceName source
data object is valid, and try to combine the data objects again.