DFS3666W DESCRIPTOR NAME xxxxxxxx CONTAINS INVALID CHARACTERS. DESCRIPTOR IS IGNORED.

Explanation

IMS initialization detected that descriptor xxxxxxxx contains invalid characters and does not conform to the IMS rules for valid resource names. All descriptor names must be 1 to 8-alphanumeric characters, that is, letters A through Z, digits 0 through 9, and national characters #, $, and @. For logon and user descriptors, the first character must be alphabetic (A-to-Z, #, $, or @).