Programmer's (e.g. internal) failures.

Error messages related to programmers's failures and what they mean. These kind of failure messages always lead to a program termination, because they report about an internal failure. An internal failure can be a wrong usage of an API for example.

Invalid print progression report!
In your caps_job_progression structure some members shouldn't have the value '0' because it makes no sense (there is no page 0!). Refer caps_job_progression for details.