CRRZG0050E Due to a null parsing
job the editor is unable to perform the action.
Explanation
The error occurs when a declaration is opened in an
item where parsing did not occur. The error can occur if annotations
and tools are disabled and the F3 key is pressed to open a declaration.
User response
Verify that the tools or annotations are enabled.
Try the process again. If the tools and annotations are enabled or
the problem persists, contact IBM® Software
Support.