Currently, an IDMS Web Services provider program must be eight characters in length. The Web Services provider interface program IDMSWSSS abends with a 3020 error-status if it isn't.
CA IDMS r19.0. Incremental Release 4.
The interface program IDMSWSSS does not support provider programs with a name less than eight characters.
A fix is being developed.
For now, an eight character program name must be used.