SAP Message RSDME164 - Source name &1 must be alphanumeric, may contain special character "_"

Diagnosis Source name must only be alphanumeric. It may also contain the specialcharacter underscore ("_"). For example, if you enter a source namesuch as 'TEST NAME', this will not be accepted since it contains aspace. Procedure You must change the source name to 'TESTNAME' or 'TEST_NAME'.