After a process failed creating a GDG due to a B37-4 abend, all inbound process fail with a RC 10 SVSE002I message.
A prior fix was put in a location which bypassed a close when there is an unexpected error resulting in the file remaining allocated.
Resolving the problem
IBM Sterling Connect:Direct for z/OS 4.8.03 apply fix T048045
IBM Sterling Connect:Direct for z/OS 5.0.01 apply fix T050066
IBM Sterling Connect:Direct for z/OS 5.1.01 apply fix UK90162