Case specific problem reproduced in NX 9.0.3 MP15 and NX 10.0.3 MP19.
Copying and pasting a Program Group gives internal errorSolution
Problem is fixed in NX 12.0.1 and NX 11.0.2 MP7
Workaround in NX 9.0.3 MP15 and NX 10.0.3 MP19 is to create a new Program
Group and copy/paste operations from original Program Group to the new